Continuity mistake: When the insect sits on the windowshield of the car Robin Williams says that the insects can't make a hole, they are safe, then the insect makes a hole, the car drives away creating havoc on the road because of extreme bad driving. The car stops, they get out, then there is no hole in the windowshield. (00:40:10)
Continuity mistake: Carl's cop car has the licence plate "G2298" which is printed thinly on the licence plate. Then, when the vine wraps around his car, and bends it in two, the licence plate is now "CFJB95", printed very boldly on the plate. The words "POLICE 004" also differ, as does the bumper and the lights. Totally new car, methinks... (01:14:55)
Continuity mistake: When Peter runs out of the attic to the woodshed to get the axe, to the left of the attic door is a large filing cabinet, with nothing in front of it or beside it. Yet later when Peter is swinging the axe at the spiders, and following shots, a green suitcase has appeared in front if it. (01:22:45 - 01:25:00)
Continuity mistake: When Judy is talking with Carl outside the front of their house as Alan examines the police car, Judy's pigtails are alternatively in front of, or behind her shoulders during shots. (00:34:18)
Continuity mistake: At the construction site, Alan claws through the mud, to get to the large metal box. His fingers get covered in mud, yet as he pulls the box out of the mud, and in following shots, the tops of his fingers and his fingernails are very clean. (00:07:00 - 00:07:50)
Continuity mistake: When Sarah, Judy and Peter are in the store, where the riot is going on, they spot the Jumanji Board Game sitting on the till counter. To the right of the till is a very large "Sand and Water Activity Table" box. In one shot the box it facing so you can see the upper part/top of the box. It then cuts, and the box has mysteriously rotated 180°, so that you can now see the lower part/bottom of the box! In the same shots, there is a trolley by the till, with some items and a box in it. Cut back to the trolley and there's now two boxes in it! It then cuts, and the box is back to it's original position, and the box in the trolley disappears! If you look more closely, the entire shelf unit behind the counter is completely different!!! (01:05:55)
Continuity mistake: When Peter rolls the dice prior to letting the monkeys loose, whilst him and Judy are in the attic, he rolls both "1"'s. The sides of the dice which are visible read "3" on one die and "4" on the other. Then when it cuts to a closeup of the boardpiece moving, the "4" now reads a "2", and the dice have also moved position. (00:25:15)
Revealing mistake: During the monsoon scene, everyone is on a table trying to climb on the chandelier. Peter has been turned into a monkey, and his face is covered in hair and has the characterists of a monkeys face, yet in shots when they are on the table, like when the crocodile snaps at them on the table, just before Alan lifts Peter onto the chandelier, you can see the plain face of his stunt double, with no monkey features! Robin William's and Bonnie Hunt's doubles are rather obvious in these same shots too. (01:17:20)
Continuity mistake: When Van Pelt comes out of Jumanji, he starts shooting at Alan. Alan then runs through the brown doors, and Van Pelt shoots, misses, and blows a large hole into the door. Yet when they all return to the room, the hole in the door is smaller. (00:53:20 - 00:55:25)
Continuity mistake: When all the monkeys are in the kitchen, Judy and Peter open the door to peek inside, and a monkey throws a tomato at the kitchen door, making a big stain of tomato juice on the door. When the monkey throws the knives at the door though, the stain has vanished, and the door is clean. (00:25:55)
Continuity mistake: After Peter discovers the bat in the attic, he runs downstairs screaming, and you can see a chair by the door of the attic with a white cloth sitting on it. However when Aunt Nora walks upstairs, there is no sheet on the chair. (00:18:00)
Continuity mistake: After Alan traps the lion in the bedroom, it makes claw marks in the door. The marks change greatly from the first close-up of them being made, to the second shot when Alan walks away from the door. (00:28:35)
Continuity mistake: When the earthquake begins, the floorboards start to break in two, and Alan starts falling so Sarah holds onto him. Watch the small circular window in the wideshot. (the window that the mosquito flew out of earlier in the film) To the left of the circular window are some empty wooden beams, but no items. When it then cuts to a closeup of the window breaking in two, items have appeared on the beams, and there's a banjo hanging up etc. (01:25:30)
Continuity mistake: When Alan drops the dice, after being startled by the clock chimimng, one die reads 3, the other 2. Yet when his board piece starts to move, you can see both of the sides of the dice, both reading 2. (00:13:25)
Continuity mistake: In the store, Hunter Van Pelt shoots his gun and hits the side of the tyre shelf, making a nick/hole in the red paint. The size and shape of the nick/hole changes between the two closeups of it, before the chain snaps and releases the tyres. (01:09:25)
Continuity mistake: During the scene when Alan is trapped in the quicksand, and the others are giving him items to hold onto, you can see behind him, to the viewers right of the blue chair in the background, a small stack of newspapers. But in later shots, such as after Peter runs out of the attic to go to the shed, and we then see Judy crawl over and grab the wooden music stand, to hit the spiders, the stack of newpapers has vanished, and a few other items change position, like the tennis racket. (01:20:55 - 01:23:00)
Continuity mistake: As Mrs. Thomas is being taken from her car, after being bitten by the mosquito, the men put her on a pedestal and you can see she is wearing long green boots that nearly reach up to her knees. Yet when they are putting her into the ambulance, she has black heeled shoes on. (00:37:50)
Continuity mistake: In the attic, Peter takes the Jumanji pieces out of the compartment, then closes it. Then when he takes the dice out the compartment, the compartment lid is open, not closed, and no-one touched it. (00:24:00)
Continuity mistake: After Judy is shot by the poison flower, Peter cradles her in his arms. That is in close-up. When it goes to wide shot, he isn't cradling her anymore.
Continuity mistake: When the hunter crashes against the supermarket wall it makes no mess - as the final wide angle reveals, yet when the kids arrive the whole place has stuff scattered all over.
Answer: Since the barb was poisonous, she was dying. This is seen when she begins looking pale and a few seconds later she isn't moving. Finishing the game was the only way to save her life.