In decades of servicing cars at gas stations and car dealers there have been many. One time I worked at a gas station. Lady needs a transmission rebuild, we tell her we will remove the transmission and send it out to be rebuilt, she agrees. Couple days later she comes back and it's not back from the rebuilder and she flips out, demands to see the boss, who is home recovering from having his wisdom teeth extracted. I tell her he is sick and will be back in a day or two. She calls the cops and tells them we stole her transmission. The cops show up and they take her side, so I call the boss at home and he comes in and his face is so swollen he's hard to recognize, so she insists he is not who he says he is. The cops can see he is suffering and he shows them his I.D. and they tell her to go home and they leave. Couple days later we finish her car and she picks it up as if nothing happened.