When Marc is forced to play Russian Roulette and survives the first click, Lukas Stenstrup then says: "Before you had 83.3% probability to survive, now you have 69.4%" after Marc has pulled the trigger once. This is an incorrect calculation. His chance to survive the second click in Russian Roulette knowing that the first click was empty (he is alive after all so what the first click had in odds is now irrelevant) is 80% (4 empty left and one with a bullet), not 69.4%. The 69.4% figure was probably derived from (5/6)^2 which would be the odds to survive two Russian Roulette clicks IF the revolver are being "re-rotated" in between clicks.