The security checkpoint in Transformers 3
Okay, so Sam goes to NEST headquarters to tip them off about the return of the Decepticons. Sounds simple, right? Wrong. The guards there completely blow him off and even try to arrest him! What the hell? When a guy comes up to you and gives you important information regarding evil forces, you LISTEN! Do all guards do this when someone tries to tip them off? Imagine how Watergate would've gone if that's happened!
And of course, there's Sam's freakout. Yes, I'd be lying if I said it made any sense. It's just the weirdest excuse for over the top acting ever.
While it's not the worst moment in the trilogy, it certainly left us scratching our heads.