Just want to give adrenaline junkies like me an update: I did skydive last month, everything was great! I didn't feel any discomfort in my head or anything wrong near the bypass area in my temple. I'd say if you have stroke free for few years post surgery and you are really into sports, go enjoy it! Moyamoya shouldn't limit your life on the ground only! go scuba diving, go sky diving, have fun!