Continuity mistake: People pass the diner window, walking by, and then in the next shot they just vanish. (00:17:35)
Factual error: Modern money in the diner, not from when the movie is set. (00:17:45)
Continuity mistake: During the café scene, Roberta's straw and spoon often change positions and swap places. (00:17:55)
Revealing mistake: When the girls are looking at Sam's mum out of the window, Teeny (Thora Birch) briefy looks over at the camera. (00:18:10)
Continuity mistake: In the diner, Sam bends her straw down twice. (00:18:35)
Continuity mistake: In the diner scene, Sam's reading book disappears after they look out the window. (00:18:40)
Continuity mistake: When Roberta pours the cokes for everyone in the diner, she puts Teeny's coke bottle down twice between shots. (00:18:45)
Continuity mistake: At the diner table, Teeny puts her paper straw wrapper down twice between shots. (00:18:55)
Continuity mistake: During the diner scene, the amount of foam in everyones glass of coke continuously changes. (00:19:05)
Continuity mistake: When Teeny puts down her paper straw wrapper it is all scrunched up in one shot, then straight and smooth in the following shot. (00:19:10)
Continuity mistake: In the diner scene, the red can with the treehouse money in it repeatedly jumps around, from the table, to the counter behind Chrissy. (00:19:10)
Continuity mistake: When Sam says "it'll work," in the diner, she puts her spoon in her coke glass and puts her hand down on the table. In the next shot she raises the same hand up, now with the spoon magically in it. (00:19:15)
Continuity mistake: The level of coke in Chrissy's bottle keeps lowering/rising, as they talk in the diner. (00:19:25)
Continuity mistake: The way Teeny holds her Cosmopolitan magazine changes between shots, just before she reads her horoscope aloud. (00:20:00)
Continuity mistake: When Sam's dad leaves, there is a grey Volkswagen Beetle parked on the street behind him. Yet in the previous shot it was parked on a driveway, not the street. (00:20:10)
Revealing mistake: It is obvious that when Sam is in her bed reading her book with a torch, that a set light is being shone at her face and that the glow doesn't come from the torch, because she turns the torch away from her and puts it on the bed, but a soft glow of light remains on her face for some seconds. (00:20:20)
Continuity mistake: After Sam's dad leaves, Sam gets out of bed, grabs her poncho and shoes and puts a bag over her shoulder. She puts her poncho and shoes out through the curtains twice, and as she climbs through and jumps out of the window, the bag has vanished from her shoulder. (00:21:35)
Continuity mistake: When they do their first seance, a storm starts and rain is pouring, so the girls run away, but Sam turns back to look, and the large white candle she holds switches hands between shots, and the cloths she's holding change position. (00:24:20)
Continuity mistake: When Sam rings the bell to wake up Roberta, as Roberta walks to the window to ring the bell back, we see a silver torch on the desk lying on its side. Then when Roberta picks it up it's standing upright. (00:26:20)
Answer: Reshooting certain scenes would most likely necessitate new stunt people, as the first one(s) would most likely be hard to get back.