19 Awesome Movie Cameos Nobody Saw Coming

5. Martin Sheen - Hot Shots! Part Deux

If you watched this film as a youngster, there's a good chance you had no idea what the Hell was going on.

In the Charlie Sheen-starring comedy sequel, his protagonist Topper Harley is sailing up a river, narrating his journey by voiceover no less, when he's interrupted by a conflicting voiceover from a man sailing in the opposite direction.

The man in question turns out to be Charlie Sheen's own dad, Martin, who reels off a monologue parodying his own performance in Apocalypse Now, and as the two boats cross one another in the river, the two Sheens shout to each other, "I loved you in Wall Street" (a film they both appeared in).

It's relatively meta and obscure for an otherwise pretty broad spoof movie, but if you're in the know, it's undeniably hilarious.