Continuity mistake: Marty is in a school shower stall facing outwards. It is a close shot. He is dry and completely naked. He covers his genitals with his right hand. A large swath of the top of his dark pubic hair is plainly visible. In the next shot, as he exits the shower and moves to his right, he is still completely naked, however, he appears to be covered in thick soap suds from above his belly button all the way down to the lower part of his thighs to the point that his pubic hair is not even distinctly visible. (00:05:50)
Continuity mistake: In the introductory scene, when Carol tells Marty she is wet all over, we see that Marty is wearing black underwear. In the very next shot the underwear has disappeared.
Continuity mistake: In the scene when Carol is running from Marty, she hides in the gym. Marty runs into the gym. Carol runs out and goes down two flights of stairs. She then goes into a room by the stairs and goes to the window...the window that overlooks the gym. Somehow having gone down two flights of stairs Carol has ended up above the gym.
Answer: Some people are not the brightest button in the box. If wanting something enough they will overlook the obvious.
Ssiscool ★