It's so damn annoying when a customer is looking over your shoulder, while you work on their car. I would want to do that too, if I couldn't fix it myself. But thank God I kinda know whats going on with cars, and I work at a very respected repair shop. One nice perk is all the fancy equipment I have access to
The real mechanics I work with amaze me with their VAST technical knowledge, and I personally would trust everyone there to work on my car, but F that, thats the fun part!