I have to blow everything up! It's the only way to prove I'm not crazy!
- Gordon Freeman on why he's detonating a stockpile of explosives via grenade
Scully, you have to believe me. No one else on this whole damn planet does or ever will. You're my one in five billion.
"Our wives, our children, everyone! They're here already! You're next! You're next!"
— Dr. Miles Bennell trying to convince random people that he's not crazy, Invasion of the Body Snatchers
Rasoul: How very convenient.
Aladdin: It's the truth! Why won't you believe me?
Jafar, disguised as Jasmine: Because we know you're lying.
Why won't anyone believe my crazy story?
— Homer Simpson, Treehouse of Horror VII