I had a really horrible experience. It didn't in the end, but it could've ended in severe injury.
I was sitting on my Mille, with my helmet on and the bike upright, filling it to the brim.
I hadn't expected it to fill so quickly, so that when it was full it then sprayed out, all over the place, and into my visor and helmet, and therefore eyes.
I was blinded for several minutes and had to shout out for help to get off the bike and put the nozzle back in the pump.
I will never keep my helmet on again when filling up my bike (or car for that matter
). I can't say that the overspill wouldn't have happened if I hadn't been wearing the helmet, but I'm sure as toast that if petrol sprays up again into my face, I want to be able to get it off quickly.
Horrible, horrible experience