The rush of excitement when doing something dangerous.. either illegal or mortally challenging. The body floats in a nether space and autopilot flips control into automatic.

Such rushing may be experienced by jumping from airplanes, shoplifting a giant chocolate bunny rabbit, smoking a joint while driving 160 kph listening to Ska, or even having sex with your boss or colleague at your workplace while others potentially could discover you (Or surveillance cameras..).

Often not pre-meditated.. a window of opportunity that opens and a quick decision is made, although the excitement of doing any such activities also leaves lingering tingles of excitement.