In scene 4 (Battling Billy Boy) of Stanley Kubrick's Clockwork Orange, the girl that is about to be raped, wears leg-straps on the right leg only, and a split second afterwards, she wears them on the left leg only.
It could just be that the film was reversed during processing. In reality it was on the right leg but when transposed the film reversed. I've seen a couple of movies done that way where letters are backwards, images and so forth.
If you are familiar at all with Stanley Kubrick, or the directing process of this film, he intentionally left in many so called 'slip-ups' such as items on tables changing position. No telling if this was intented or not, but most likely it was.