ok well this is simple enough. a crash and burn is the rejection of a pua when trying to approach a set or interact with a set. even the best of pua's still get rejected and have learned how to handle it. who cares you got rejected but the best part of this i like to talk about is using crash and burn openers. after knowing how it is to be rejected, you can actually use others guys rejection to open and a girl and pick up where they couldnt. so when you notice a HB10 getting hit on left and right, you can go up, state the obvious and then build rapport with her by knowing where she is coming from. if opened like this and another guy comes up you can actually AMOG the shit out of him by using your rapport topic to back her up and ruin his game.
even the best of pua's when put on the spot and can think quick enough cause they havent been put in this situation will crumble at this. lets say you crash and burn approached a HB10 and you transition well but a guy comes over to try and cock block or steal the target. actuall try turning it on him and saying something like "oh man another pimp trying to game you, lets hear this ones pitch!". i know if put on the spot like this i still might crumble even knowing this could happen.