That's fucked. She must be a really nice girl because anyone else probably would have caused quite a fuss after you deliberately shot a load on her face without telling her and after only paying for standard service. It's a pretty low act and not really something to be proud of. If you want to do stuff like that then pay for the diamond service and even then you should check with the girl before you blow a load in her face. Sorry to be a downer, I know you feel like you just scored big time, but shit like that could get you banned depending on the shop/girl. Treat them with respect dude and don't be a tight-arse. You wouldn't like it if someone took advantage of you while your at work and dodged paying you properly, would you?