... can hurt.
Often enough it nearly destroys your knee, setting you up for a number of operations and loss of function.
Somtimes, you may be lucky enough to just get off with a cut, like ...
Kiteloops can go wrong, nearshore particularly so landing in 8 inches of water.
Throwing the loop
From:
http://www.kiteforum.com/phpbb/viewtopic.php?t=2340325
Other guys have been dragged head first into walls, berms, etc. suffering far more serious injury.
Distance (and good sense) Is Your Friend