That older contractor who called my mud a 'mess of worms'
I was mudding a ceiling in an old house near downtown, and this retired drywaller walked in off the street to check the progress. He stood there for a solid minute, then said 'Son, your mud looks like a mess of worms, not a smooth coat.' I wanted to be mad, but honestly he was right. I had been rushing and my taping joints were all lumpy. He showed me a trick with a 12 inch knife and a damp sponge that fixed it, and I still use that method today. Anyone else ever get schooled by a random stranger on a job?