While talking to Donna, Randy says, "If you took all the people I dated, and all the people you dated...". Then Donna finishes his sentence with, "You would have a room full of girls, and Eric". This is not true. While she and Eric were broken up in season 4, Donna dated Kelso's brother, Casey.
When Fez knocks over the torch, the flame is not near the fire pit/record pile. However, a perfect fire starts in the center of the record pile and the torch never changed position on the ground.