Continuity mistake: While Dr Soaper is doing the exercises with the girls at the camp site, Peter Potter gets out of his tent and starts watching them. When the camera is facing the girls, Barbara is not there. But when they are touching their toes, Barbara is there.
Continuity mistake: At the start of the film, when Sid parks the van outside the shop, a blonde girl walks past. When he gets out of the van, he ogles the same girl as she walks past the van a second time.