It's not quite as gritty as traditional Russian roulette, but this "Low on Risk" balloon gun does retain the two core elements of the game—chance and the threat of bodily harm.
Like a traditional revolver, there are six "shots." Each pull of the trigger could result in the discharge of a pin that pops the balloon. Naturally, if the balloon is placed next to your head, the pop could leave you with a ringing in your ear. Not exactly deadly—although I suppose perennial losers could end up going deaf over time. Available for $US16. [EarlyAdopter via WTFismo via nopuedocreer via Coolbuzz]