I've never overfilled any of my bikes, usually I stop or the pump stops by itself once the bike is full. And I always watch carefully once filling up because I never trust the automatic shut-off although it never failed me. Until last week when filling up the rocket, for a second I looked away just to look down again and find that it was overflowing and the nozzle was still running, until I let go. Gas was all over the tank and probably the engine. closed the gas tank and drove away, thinking I wonder if I'd have time to jump off it if it catches fire. It never did though.
But i'm surprised the nozzle didn't stop by itself. Something with the design of the the gas tank I think. In ~15 years of riding never happened to me ever.