Well, when I was still working part-time at my parent's shop, I was an eye witness when the jeweller from across the street was shot point blank after he chased down the guy who just stole about 40 Breitling and Jaeger le Coultre watches. That was really frightening. Luckily that guy was pulled of his little motorcycle when his gun went empty and he tried to flee. He really, really really got his *** handed by some mean looking bystanders.
Mind you, I live in a fairly small Dutch city (approx 70.000 people) where these acts of crime were never seen before. I was shocked to say the least.
My biggest 'fun-rush' was in Crete, an island off Greece. There was a big waterpark there with a bungee jump crane. My three friends and I teased eachother for about an hour before I took the bait and jumped. That crane lifted me above the ocean, and that was a spectacular view and a very big adrenalin rush. Well worth the 50 $.