At the beach, Eve begins to remove her blouse twice between shots.
The assumption that Jeff's body will, if burned beyond recognition, be automatically identified as that of the missing male nurse is, of course, quite false - for one thing, Jeff is an American and can be identified as such by his teeth, American dental procedures being in various ways quite different from European ones.
At the beginning of the picture, on the floor of the garage when the rapist is dragged out of the car, a chalk mark in the shape of a "T" is visible on the floor - commonly used by set builders or by the director to block a scene.