Revealing mistake: When Neil starts to sneeze, he carefully puts his hands close to his nose to give the impression that the green jet is coming from his nose. However, in one shot, just before the guys bag him we see the jet appearing from his hand while his hand is several centimetres from his nose.
Revealing mistake: When Rik jumps in his bed with the magazine and the circular saw comes out, watch closely and you can see the bed and sheets are already in two halves.
Revealing mistake: After Mike burns the stumps (aka Rik), the special patch that was set on fire on the back of Rik's overalls is visible.
Revealing mistake: When the vampire is shaving himself in the toilet, the reflection in the mirror of his shaving cream, clothes and gloves is almost, but not quite, identical to his movements. The empty suit in the mirror and the visible part in front of it were shot separately by copying the other part's movements as closely as possible, as the surviving raw footage can prove. It's hard to see, but there is a small difference between the motion of the hands.
Revealing mistake: When the bus explodes, an explosive charge can be seen on the ground beside the bus just before the explosion. (00:34:01)
Revealing mistake: When the bus falls off the quarry, there appears to be an open door next to the driver's seat, presumably so that the stunt driver can jump out of the bus before the crash. (00:33:45)
Revealing mistake: When Vyvyan is hitting Rick with the cricket bat, it wobbles when he swings it, revealing it to be a rubber prop. (00:07:15)
Revealing mistake: When Neil imagines himself turning into the Hulk, he throws the other three characters to the ground. When Mike is thrown, just before the shot cuts to him landing on the ground, the ground can be seen bending inwards when Mike's foot touches it, revealing it to be fake. (00:05:13)
Revealing mistake: When the policeman hits Rick with a chair, the chair legs can be seen wobbling, revealing it to be a rubber prop. (00:25:17)
Revealing mistake: When Neil is lifted into the air so that he can change the lightbulb, wires can be seen lifting him up. (00:24:50)
Revealing mistake: Whilst Vyvyan has Neil raised in the air, in the shot of Neil saying "Okay, here's a joke for you, Rick," the wire lifting Neil up can be seen near his waist. The wires can be seen again when the band starts playing and he starts waving his arms. (00:20:58 - 00:21:20)
Revealing mistake: When Vyvyan's head is guiding his body towards him, there is a shot of his head on the ground saying, "You took your time, you bastard." In the shot, the ground can be seen moving up and down slightly, revealing that the ground is fake, as well as revealing the use of a hole that the actor is sitting in. (00:23:03)
Revealing mistake: When Vyvyan yells at his knickers, it cuts to a close-up shot of the knickers while they are on the ground. In the close-up shot, to the right-hand side of the frame, the corner of the knickers can be seen lifting off the ground slightly, revealing the use of a wire to pull them. (00:11:27)
Answer: His IMDB entry is at http://uk.imdb.com/name/nm0113055/.
jle