A journeyman in St. Louis told me my welds looked like bird crap, he was right
He was a crusty old guy with a cigar hanging out of his mouth and he watched me run a bead on a support bracket without saying a word. Then he points at the spatter and says 'you in a hurry or just scared of the puddle?' I laughed but it stung because I knew I was rushing to beat the clock on a Friday shutdown. He spent ten minutes showing me how to drag the rod smoother and it saved my ass on the next fitting. You ever have a stranger call you out like that and it actually helped?
Had a guy named Ray at a shop in Tulsa do the same thing to me about my travel speed. He made me watch him run three beads without saying a word, then just said "see how it sounds like bacon and not popcorn." That tip stuck with me for 20 years.