If you’ve tried a few adrenaline activities, which one surprised you the most?

I’m planning a trip to Slovenia soon and want to try at least one big adrenaline activity while I’m there. I’ve checked out Xsport Adrenaline Adventures, and everything on their site looks really fun. Since I’m on a tight budget, I can only pick one activity this time.

For those who have tried a few adrenaline experiences, which one was the most memorable or surprising for you?