3 ms·Sticking Two Elevators in One Shaft Is Totally Safe – And a Great Idea2 points by ozim 10y agobasicplus2 10y agoOr.. the continuous version http://m.youtube.com/watch?v=Zx3MHm9WjBE http://m.youtube.com/watch?v=Zx3MHm9WjBE