I guess such nasty people work on both sides of the pond. I was a mason contractor doing a job with a carpenter/builder who thought his practical jokes were quite hilarious. I am also a practical joker of sorts; but I do not play games that are hurtful or costly to others. This guy went into great histerics when he would drop a handfull of nails in my mortar. He usually threw hem into a whole batch and it would take my helper and I several minutes (you know---time is money) to sort out the mess, some mortar most certainly got thrown out. Harry, the joker would laugh the whole time we spent sorting the mess. One day, I was working on the fireplace running up the fire box. Setting fire brick to a thin joint is not the easiest part of building a chimney and the mortar needs to be just right, just right, , it must be perfect. Well, I was right at the middle of the back slope, which requires quickness and care, and the mortar needs to be better than perfect. Harry comes along and throws his typical handfull of nails into my mortar and continues on his laughing way out onto the roof where he was laying shingles. I said nothing but instructed my helper to go to Harry's nail supply, the big headed type for nailing down asphault shingles, mix the shingle nails in with finishing nails, and any other nails he could come across. As he was very carefully mixing nails, I shoveled the contaminated mortar out of my pan and very carefully poured it into each of the nail kegs and tried to shake them up a bit more. By the time Harry came down off the roof to get more nails, the whole mess had set up pretty good. Strange thing was that Harry did not think that was funny. Sometimes the ugly ones just need a little turnabout.
PS: I never had any more problems from Harry with spilling nails into my mud. He did, however, continue with his nasty humor and I did have further run-ins with the guy, but that is a story for another day.
Tinker