Since this is an aviation site, I thought you might enjoy this:
Two men meet in a bar atop the John Hancock tower in Chicago. After a few drinks one turns to the other and says, "You know, there are some very powerful air currents around these tall buildings. I found that at the base of this building in the NW corner there is a massive updraft so powerful it will stop a falling body and allow it to land safely on the sidewalk." The second man replied, "that's baloney, I don't believe it for a second." The first man replied, "OK, follow me and I'll show you."
The two med climb to the top of the tower and the first simply steps off. He falls like a rock, faster and faster until he is about 25 feet from the sidewalk. He slows down, and simply put his feet down on the sidewalk.
Back in the bar, the second man turns to the first and says, "that is the most unbelievable thing I've ever seen. I still don't believe it." The first replies, "OK, let's try it again." They climb back to the top of the tower where the first man steps off the edge, falls, hovers, and steps to the sidewalk.
Back at the bar, the second turns to the first and says, "Amazing, I have to try that." They climb back to the top of the tower where the second man steps off the edge. He falls like a rock until SPLAT… he lands 5ft under the sidewalk.
The first man returns to the bar and orders another drink. The bartender brings the drink and says, "You know Superman, sometimes you're a real jerk!"