If you've ever crowdsurfed, you will know that it can be great fun, as the sea of hands in the packed crowd below make light work of passing you along,
If you've ever been at a gig where the crowd is just not quite tightly enough packed for proper crowdsurfing, you'll know that nine times out of ten, it all ends in tears as the would-be surfer unceremoniously tumbles to the ground and snots themselves.
Such as in this clip of a girl at the 2014 Op De Toffel festival in the Netherlands, who hesitates for what seems like an eternity before making the dive, and in fairness, probabably shouldn't have bothered.
Ooof.
The guy's face at the end says it all.