Continuity mistake: During the song "I Can Make You A Man" as Frank-N-Furter pushes away the vaulting horse, you can see the hand at the right of the screen, pulling the attached wire to assist Tim Curry. (Visible in the theatre and on widescreen DVD - but the TV version crops it.) (00:41:35)
Continuity mistake: As Frank leaves the pool and sings "I'm going home", his makeup is clearly running all over his face, in the next shot it is perfect again. (01:26:40)
Continuity mistake: In the dinner scene, Riff Raff pours Dr. Scott's wine in one shot and again two shots later. (01:04:45)
Plot hole: When the castle is about to blast off, Brad and Janet abandon Dr. Scott's wheelchair at the door of the castle and carry/drag him across the porch and down the steps. After the blast off, Brad, Janet, and Dr. Scott are on the grass and have been blown some distance apart from each other (in the UK version, there's another song where Brad and Janet crawl toward Dr. Scott so they are blown farther apart than shown in the US version). It seems extremely unlikely that the remains of Dr. Scott's wheelchair just happened to fly from the doorway to land directly under him during the blast. Brad and Janet can barely crawl so they didn't move him or it. (01:34:10)
Continuity mistake: When the color machine has been lowered and Frank has finished opening the spigots, there is a shot which shows his reflection in the monitor on the console where Riff Raff is turning the crank. In the reflection his hands are up in the air, waiting for the color machine to be lowered - which, of course, it already has. (00:35:50)
Continuity mistake: Near the beginning of "The Time Warp", we see a male Transylvanian handing a tray of snacks to another Transylvanian (note the b/w socks and shoes) off-screen to the left. In the very next shot, he is holding the tray of snacks and eating a donut. (00:20:35)
Continuity mistake: As Brad and Janet enter the ballroom at the beginning of "The Time Warp", a red carpet runs from the throne at the opposite end of the room, down the steps, and clear across the floor to the ballroom entrance. After the second verse, as Riff Raff and Magenta dance across the floor, the carpet stops short at the bottom of the steps. The full-length carpet reappears and disappears several times during this number. (00:21:30 - 00:22:15)
Continuity mistake: When Tim Curry is about to pull the switch to send Dr. Scott into the room, he starts to lift up his left leg. In the close up, it's his right. (01:01:00)
Revealing mistake: When Dr. Scott's wheelchair is being pulled by Frank-N-Furter's magnet, just after passing Magenta and Columbia, Dr. Scott soars up the next flight of stairs. Look between the cobwebby banister bars and you'll notice that the 'stairs' are actually a flat surface. (01:01:20)
Visible crew/equipment: In the lab, just after Brad is Medusa-fide, when Frank-N-Furter steps in front of Dr. Scott, two moving reflections are visible on the surface of Rocky's tank. One is Frank-N-Furter's and the other is the camera moving right behind him. (01:12:35)
Continuity mistake: After Frank-N-Furter makes his initial appearance, when he bumps into Janet on the way out, her necklace chain is under her large pink dress collar. Once Frank-N-Furter leaves, her chain is actually around her neck now, over the large collar, so Riff Raff can easily pull the dress down unhindered. (00:27:00 - 00:27:50)
Visible crew/equipment: When Eddie rides his motorcycle on the lab's upper level, in the second shot from behind him, just as he veers a bit to his left, the equipment attached in front of the windshield becomes visible (at the left). It's gone in other shots. (00:44:35)
Continuity mistake: Before Rocky's unveiling, when Frank-N-Furter is giving his speech, the rubber gloves he is wearing go from being folded, to being straight, and back again. (00:31:30 - 00:33:00)
Audio problem: During the first song sung by Rocky as he is getting his bandages removed when Rocky sings "Oh no no no" his mouth doesn't move. (00:37:30)
Other mistake: After Frank releases Dr. Scott from the Triple Contact Electro Magnet, Janet and Rocky are heard giggling in Rocky's birthtank. As Frank walks over to the tank, the right magnet pops out again just before it goes off-screen. (01:02:45)
Continuity mistake: During dinner, the Stein mug in front of Rocky (not Dr. Scott's) switches repeatedly, from being to the right his plate to the left of his plate. Additionally, plates/serviceware appear and disappear from the table.
Continuity mistake: Dinner party - Brad's party hat: After serving Dr. Scott's wine, Riff Raff passes by Brad's chair and knocks his hat off the back of the chair so it's hanging by the string. In the next shot showing Brad a few seconds later, it's back to its normal position. (01:04:55)
Continuity mistake: Towards the end where they are all in the pool singing, Dr. Scott is saying how he can't fall into his trap and pulls up his leg and you see the stocking. A few seconds later when they cut in with a faster beat, you see his leg fall to the ground. There is not a stocking on his leg. (01:24:16)
Continuity mistake: During "Hot Patootie", before Eddie drives up onto the ramp, there is a group shot of the Transylvanians dancing. Two of them disappear from one shot to another. The black guy and the Arab can be seen kicking out during the line up but when the camera changes to the wide shot of them all they are both gone.
Continuity mistake: Near the beginning of the movie, in the "wedding scene," when we first see the little camera man his camera has an old fashioned flash (a round metal dish with a flashbulb inside). When he takes the wedding photo, the camera has a modern electronic flash on it. (00:05:00)
Chosen answer: She kicks him in the groin when he has her cornered on the stairway.