Base jumping, as you may know, is jumping off tall buildings with a parachute. You are, therefore, much closer to the ground when you pull the cord then you are with skydiving or parachuting. Hence the increased thrill, I suppose.
This group have taken to base jumping from enormous, sheer cliffs. They’ve put together a well-edited video of themselves in action. The footage has been slowed down to the extent that they look like they’re floating rather than falling at enormous speeds, and the end result is beautiful. Watch it, you’ll thank me.