A few days ago I wrote about a publicity stunt by Liebherr, where several of their cranes lifted each other into the air in a sort of 'crane chain reaction'. It seems that someone took video of the affair, and it's now been posted on YouTube. To make it even more interesting, it seems that the first and smallest crane actually hoisted a model crane on its own sling, making this a five-crane lift - sort of! To see it more clearly, view the video in full-screen mode.
Looks like everyone involved had fun - although I note that the operators of the smaller cranes all left their cabs before their vehicles were hoisted. Looks like trust only goes so far . . .