My guess...it wouldn't have mattered if in addition to your throttle-blipping you might have had a 125dB horn on your bike a hit THAT a few times TOO, Rob. 'Cause ya see, I'm thinkin' the guy probably had Eminem's latest cranked up through his earbuds!!!
Sorry to hear this, but hey it could be worse, ya know. Your gas tank could've gotten dented too.
(...and THAT would've REALLY p*ssed ME off!!!)