I once read that the chance of Russian Roulette is NOT 1:6 but more like 1:600, since you play with one bullet and the weight of the bullet makes it relatively unlikely that the bullet stops next to the top position in the barrel when you spin it. Don't know if this is true but in the end, it doesn't matter for this stupid game.
I thought it was a theoretical game that no one actually plays.
[1] http://en.wikipedia.org/wiki/Russian_roulette#Notable_incide...