I'm late too this party. I like "say gone".
Maybe there are some other late comers. Here's a few other thoughts:
"Whoop", the sound I think I hear everytime he does a move (juke, hurdle, freeze n go, etc) and the player misses.
"Wiff", the sound players hear when they miss.
"Whaaaaaat", the sound those make who first witness some of his moves.
"Swoosh", the sound he makes each time he kicks it into the next gear.
Which brings me to,
"Cha-ching", the sound Nike hears when they look forward to his contract.