I got into my first highway race against a ZX-7R last weekend, and the wind was blowing at us, which made my front wheel come up just enough to start it wobbling whenever I was in my powerband. (9,000-12,000 rpms) It was quite exciting, but scary to have the front wheel come up at 130-150 mph!!!!!!!!! All I had to do was crouch over and push down on the front more to keep it down!
We're not talking big wheelies here, just the wheel coming up about 3-4 inches!
I know.. off topic, but it was fun!