well for the most part i don't mind if someone watches me work... but i had one customer who literally came behind the stove with me, and was promptly told he needed to keep a safe distance for safety reasons, well he continued to watch from over the counter
at one point his wife told him "give the man room" he then told his wife "mind your own buisness, woman"
shortly after that he went away for a minute and his wife gave me an apologetic look so i put my finger to my lips as to say "shhh dont say anything" took a BIG hanfull of screws and maretts and wire ends out of the tool box and set them on the counter
shortly after i finished repair(husband is back watching now) reassembled the stove then looked over at big pile of parts, scratched my head, rubbed beard and said outloud "these couldn't have been important anyways and scooped them back in the toolbox
well... old man went red in face started to say WHAT WHAT WHAT, by now wife has laughed so hard at him she fell out of her chair,
i let her tell him the joke after she stopped laughing
he stomped off mumbling "pay the man" and yes she tipped well