What is that movie you saw at too young an age that still haunts you to this day?

Both of mine I later learned are comedy/satire:

Starship Troopers and Mars Attacks.

The sheer gore from Starship Troopers made me ill.

The Martian design was freaky and I wasn't a fan of the instant death lasers. It had me thinking aliens could come down one day and we'd have no chance against them.