First off, most of what I know comes from RtRtD, link
here. Basically, we each choose an action, then the GM rolls a D6. 1 = crit. fail, 2 = fail, 3 = okay, 4 = success, 5 =
flawless success, and 6 = anywhere from far too much to, uh...
(5) You manage to struggle free of the guards and sprint to a safe distance before tossing a knife at one! (5 + 1 = 6) The throwing knife zips through the air, slitting a guard's throat! It then travels around the group of guards like a boomerang. It (5) Slits another throat, (Three 6's in a row!) decapitates three more (!), (4) slices open the last guard's arm, and (2) narrowly misses a random bystander. It then flies back into your hand. Holy crap.
That
actually happened.
For more examples of what happened in that game, you can read the thread (link was up there) or the TvTropes page (a website suitable for classification as a psychological weapon, and thus not linked right now). Dermonster's reputation and profile image also come from that game. He summoned his blood into becoming bones.