Highlander II: The Quickening (1991)

Revealing mistake: At the beginning, when all the guys are running away from the explosions in the war, you see a guy getting thrown into the air, but the black kickplate that propels him into the air is clearly visible.

Juan Ramirez: You've remembered almost everything I taught you.
Conner MacLeod: I've had a lot of practice lately.
Juan Ramirez: There is no substitute for experience.
Conner MacLeod: What experience? You've been dead for five hundred years.

Trivia: The original script had a cameo from "The Kurgan", the villain of the original. It was going to be revealed that Kitana had paid him off to go to Earth and kill MacLeod. Kurgan's death would be part of what eventually motivated Kitana to send his other goons after MacLeod.

TedStixon

Question: Can anyone give a reason as to why he was made younger after being hit with that gas tanker with the lips? It's true that he was once again immortal, but that doesn't mean that he should've reverted to the age he was in the first film.