So I did something a bit bad this morning. An old dude was in the car wash bay before me. He only gave his car a rinse with the hose, then he hit stop and left. I drove in and saw it said he still had like $8 credit left so I was like "score" and started washing my car thinking he just overloaded it.
Then as I finished I thought that $8 seemed to go a long way then noticed it hadn't stopped and it had kept adding time. After reading the sign it turns out the 'credit' was a $15 credit card hold and you can stop it anytime before that using the stop button on the card reader (not the stop button he used on the wash options) and it'll just charge you for the time you used with a minimum of $5. I hit the correct stop button so he wouldn't have his card drained but the damage was done.
So he ended up paying $16 to rinse his car and also wash mine...