Do I have a serious problem? ?

The feeling of adrenaline can be almost like a high I guess since you get that rush from it. I've gotten that feeling too so your not alone on this. Basically, I think it's how you control it instead of it controlling you. Could be pretty hard but you should start to try and control those sudden impulses or at least try to redirect them into something else. If you can't control them and it starts to become a serious issue in your life, I suggest getting help. Maybe a hypnotherapist or something so you can get rid of that habit.