Good one!
I don't know why but when I first started sim flying and for some time after that, I would actually get scared some when bad things would happen like a crash. Even tough IFR flights would turn my knuckles white, it was an odd sensation since it was only a sim. Now I'm a lot more relaxed yet still have those quick moments of unease when things get tense.
I might be the only one that feels this way but it certainly made for some exciting flights.