Let's call him Monty Hall
http://puzzles4you.blogspot.ie/2009/...hall-trap.html
It's a great puzzle. When I'm selling stuff I'll give people 2 choices and they choose the second one 99% of the time.
Just like when you're Q-ing at a bar, the guy in front will take his drinks and 99% turn to the left, so be at his right elbow and you'll get into the space quicker than the guy Q-ing at his left elbow.