OMG, I remember when I was about 25 going to the barber's for a trim. I had to take off my specs so couldn't see what the bloke was doing but he seemed to be taking ages and faffing around a lot. My suspicions began to grow and then he produced a mirror and handed me my glasses.... HORROR! He had given me a combover! I am normally mild mannered but I was so shocked that I told him in very sharp terms to get it off, fast and who the hell did he think I was?
The only other time I remember being abrupt with a stranger was recently when I took my cherished 1/2" wood chisel to the local DIY shop and asked if they knew someone who could machine the tip back to a nice square shape and a good accurate angle because many years of hand sharpening had given it a bit of a curved edge. He assured me he did so I left it, with slight misgivings. Went back a few days later and to my horror somebody had put it on a hand grinding wheel and had completely butchered it, leaving it scored, uneven and overheated with black, blue and yellow oxidation stains all over it. I hit the roof and had a major strop, how could anybody treat my beloved chisel with such casual disrespect?