Oh man, my laptop once decided to bluescreen in the middle of a packed coffee shop, the fan sounding like a jet engine. I just slowly closed the lid and pretended to be really, really interested in my empty cup for a solid five minutes. Learned that lesson the hard way, for sure.

Ugh, same here, those tiny bubbles killed my projects until I adjusted my torch angle.

Ugh, I dealt with this at my last job with used solvent! They wanted to pour it out back to save on disposal costs. I quietly took pictures first, because notes get "lost." Then I went straight to the shift lead, not my direct boss, and said it was a huge fines waiting to happen. They grumbled but got a proper dumpster the next week. Sometimes you gotta show them the money it'll cost to be dirty.