Scariest moment would probably at laser trek in calgary, playing a simple elimination round.
I was messing around in the maze, rest of my team got shot out.
I mercy-killed one of the other team just as his buddies showed up. I got lucky, and nobody asked me what team I was on. I took up position as the second last person in a line of 5 guys. We roamed around for about a minute looking for the last opposing member (aka: me) before I shot 2 guys in front of me and called myself out.