Don't know about threes, but I can sympathise with the blown eardrum bit. I let a guy on the street change a tyre for me the other day. Unfortunately he didn't put it in properly and just stuffed a hand full, all bunched up, into one part of the wheel. So when I pumped it up it was a bit softish feeling. I put a little more air in with my floor pump, in a concrete corridor and had it blow up straight into my face. When I took it off I was able to see what he had done. I felt like going back and punching his incompetent, lazy, ignorant farking face in.