As one commentor on YouTube stated, "germans: the new russians."

Let's get this straight... The dude in the video is f#%kin sexy!  Look at that lil' nub in that speedo.

Doesn't matter though, because it's his "arse" that needs attention.  And maybe his spinal cord.  After watching this video, you may want to go to the chiropractor.  

I am guessing he heard the phrase "YOLO" and then thought "F#$k the world!" and went for a dip.  I think the actual translation right before he jumps is... "mudda fugga.. f#$k da f#$kin verld... en mine... you burns.. its cold...  suzie q."