Visible crew/equipment: In the lab, as Eddie rides his motorcycle on the upper level, in the shot from behind him, the large rectangular reflector/light screen is visible down below to his right. It is angled up, facing the upper level as he rides past. (00:44:35)
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)
Visible crew/equipment: Just as Eddie rides his motorcycle down from the lab's upper level, in the shot from behind him, set equipment and a few crew members are seen gathered at the top right of the screen, just before the shot cuts away. (00:44:40)
Revealing mistake: At the end of "Hot Patootie," an enraged Frank-N-Furter snatches an ice axe from the deep-freezer and menaces the terrified Eddie. There is no blood seen in the freezer at this point. Frank swings his first blow and completely misses Eddie, who is scampering into the deep-freeze several feet ahead of Frank. There is no blood seen in the freezer at this point, either. Frank then pursues Eddie into the fog at the back of the deep-freezer and viciously murders him with the ice axe (a genuinely horrifying scene as Tim Curry plays it, but the murder occurs entirely off-camera). But then, as Frank emerges from the freezer moments later, we see a splattered and gory trail of fresh blood leading into the freezer, as though Frank had already mortally wounded the escaping Eddie even before the offscreen murder. This looks as though footage from an alternate and more graphically violent version of this scene was kept in the revised scene, causing the gory blood trail to appear out of nowhere. (00:45:15)
Continuity mistake: When Janet rips the front of her white slip, the ripped strip of cloth is much larger than the bit she places on Rocky in the next shot. (00:55:45)
Revealing mistake: When Dr. Scott is being pulled through the castle by the Triple Contact Electro-Magnet, you can see the cable and the cut in the carpet, that the cable runs under, pulling his wheelchair at the top of one of the staircases. (01:01:00)
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)
Continuity mistake: When Frank-N-Furter is talking to Dr. Scott just before he reveals his relation to Brad, Furter's right leg goes from being on the arm of the chair Dr. Scott is sitting in to a standing position from shot to shot. (01:01:50)
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, on the back of Rocky's chair there's a party hat which keeps switching from being upright to hanging by its elastic over the chair's ball finial, depending on the angle of the shot. (01:03:55)
Continuity mistake: In the dinner scene, Riff Raff pours Dr. Scott's wine in one shot and again two shots later. (01:04:45)
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: During dinner, when Frank begins to sing Happy Birthday to Rocky, Magenta walks around the table serving the slices of "meat", but in Frank's closeup when he sits down Magenta is still standing beside him. (01:05:30)
Continuity mistake: During the dinner scene, there's a party hat on the back of Janet's chair. It disappears in one shot. (01:05:35)
Continuity mistake: After Frank-N-Furter carves the "tender" main course, when Riff Raff tosses one piece of 'meat' onto Brad's plate, in the next shot Frank sits down, but when it cuts to the wide shot Riff Raff tosses the piece of meat onto Brad's plate again. (01:05:35)
Audio problem: During the dinner scene, just before Dr. Scott says, "We came here to discuss Eddie," we can hear a banging sound and see his wheelchair move back a little bit. (01:05:50)
Continuity mistake: During dinner, when Frank-N-Furter pulls off the tablecloth revealing the corpse, in the first close-up the platter of carved "meat" is quite gone, but it reappears in the next shot. (01:09:30)
Continuity mistake: Right before 'Planet Schmanet Janet', look at her slip right after Frank slaps her. In the close up, the back is intact. But in the wider shot, the back is ripped. (01:09:50)
Revealing mistake: After Frank-N-Furter pulls the lever to immobilize Janet, Brad and Dr. Scott, Janet's feet are positioned close together when Frank-N-Furter shouts, "Planet Schmanet Janet,", but when she screams, "Stop!" her supposedly immovable feet now have a space of about 2 ft. between them. (01:10:50)
Chosen answer: She kicks him in the groin when he has her cornered on the stairway.