http://www.snopes.com/photos/accident/crane.asp
Apparently there has been a rash of cranes falling out of the sky in past years, which we're even seeing down here in Florence, South Carolina now:
Well, its only a hundred degrees outside with the humidity at 200%. At least it was the old AC unit. It looks like there were some shrubs keeping them from extending that 4th leg on the crane, if you look at the third picture above - you can't see it ;). I hate when that happens.