Replying to Gas jockeys

So, today me and a co-worker are chilling and this ladie shows up. She's middle Eastern and has a bad accent, so I ask her fill on regular, she says yes. Then I asked again (company policy) she says yes again, so i fill it up. All while this my co-worker is standing next to me and is listening. So when it is done it comes to $56.44. She hands me 30 bucks and starts screaming saying she only wanted 30. Me and this guy both know she said fill. She all of a sudden starts driving away, so my buddy stops her. Says she has to fill out a overflow sheet. She nails the gas just about hits him and gets away. I got her license plate so i'm interested to see what will happen tomorrow. Sorry, just really angry right now. Anybody else have any other experiences like this?