Mexico

So I go in for a flat tire and ask the man Cuanto? How much? He says 5 dollars. I say lets do it. Sounds like a bargain. He does the job in 5 minutes and I hand him his 5 bucks. He says thank you. I walk to my car and start the car getting ready to leave when he walks up to my car and says, hey you still owe me 10 dollars. We get into a shouting match and I tell him it is not okay trick people and change his price after the job is performed. He gets violent threatens to puncture my tire if I don't pay him his money. Fearing for my safety at that point I reach in and pay him his money. This man is a crook!