Nothing I did, but my seatmate — and I still shudder at the memory. He was a lawyer, and was flying to Northern Alberta from YYC for a court appearance. After spending the flight going through his legal briefs, the announcement came on that we were starting our descent. He put the papers back into his briefcase, and then took out an electric shaver. And proceeded to clean up his five o'clock shadow to be presentable in court. And THEN, he opened up the shaver and dumped all of the hair, skin particles and goodness knows what else onto the carpet by his feet. And banged the shaver on the seat a couple times to make sure the shaver was clean. Good lord...