A few I can think of, biggest in LFS I think was racing Petri (Sracer) on Aston GP in the ESCC for pretty much the full race, having some way huge adrenaline rush going on there for sitting infront of my pc, think it also gave some viewers on the stream a good rush too.
In real, well my first major moment in the corsa the other morning, quite slippy roads, coming off the motorway to a dual carrige way, not going fast but over a quite awkward bump, the rear just jumped out hugely, guess that was more of a 5 second thing though, like sex with a supermodel, aint lasting very long.
Quite hard actually to think about the things, obviously not sky diving or track days, maybe the track days will change soon though.