I think TAG said he had 400 miles on his bike so I don't think it was from crap in the tank but, you never know without looking.
Now that he said this was a stop and go in heavy traffic situation, the idea of a pressure building up in the fuel tank is a possibility. I know my 2011 G5 has the California sealed tank system on it and if the tank gets hot because of the heat coming off of the engine at long waits at the stoplight, pressure does build up in its fuel tank.
Every time this happens, suddenly I'll hear a sound that sounds just like the bike is letting a big fart.
It doesn't seem to bother the engines running but I guess it's possible that if the pressure valve wasn't releasing the pressure it could over-pressure the fuel injector. I'd think that would just make it run rich but who knows? Maybe there is some sort of shut off built into the injector?
As far as the fart sound goes, I can easily identify with that noise. Kinda like two old farts having fun on a motorcycle, voicing their thoughts on the world around them.