Once in the late 1990's, I remember seeing a scene of a film on TV, where this guy walks into an army tent, and there's a bunch of strange people inside playing russian roulette. He get's invited to sit, and eventually gets someones blood splashed all over his face as the gun goes off. The next round of the game is with a live grenade, and at that point the guy hurries out of the tent. I'm pretty sure one of the players was dressed as a clown. I have no idea what the film was about, but seemed somewhat surreal.
Was it a comedy movie? It sounds like it could be a parody of The Deerhunter? A blind guess would be Hotshots Part Deux, but it's been years since I saw it.