1. Probably the scariest moment of my life was when me and a bunch of friends rented some speed boats, we each had one, I was the first to leave the dock and slowly exiting, one of my friends yelled at me to speed up, I hit the gas, then hit the front end of a boat crossing in front of the dock, my boat flipped and I landed in the water with the boat on top of me. It took two or three tries to get out from under the boat.
2. Another was visiting Sting Ray City, supposedly an area full of "friendly" Sting Rays, I went in the water and immediately about 5-6 Sting Rays came around me, got totally freaked out and jump right back into the boat. Only one guy ever got stung there before and that's because he lifted the Sting Ray out of the water, but I didn't even want to chance pissing one off.
3. Driving back to college the day after a blizzard in total white out conditions, literally couldn't see 10 feet ahead, skidded out and into a snow bank, had to back up to get back on the highway and just hoping no one would be driving in that lane as I tried to get back on the highway since they wouldn't see me until it was too late to stop.