I had a woman who was so large she couldn’t fit in the seat with the center arm rest down sit next to me. I spent three hours squished against the side of the plane.
On another flight there was a guy sitting across from me (I was in the aisle seat on the left, he was in the aisle seat on the right). The flight had been delayed for several hours, and I suspect he had been drinking in the airport. As we were taxiing he started asking for a vomit bag, and then lurched into the aisle (right next to me) and started the first of several episodes of vomiting into successful vomit bags.
We taxied for quite awhile, while the flight crew assessed whether he was going to be all right, and then the pilot made an announcement that he and the co-pliot had ‘timed-out’ (too many consecutive working hours) because of the delay, and so we had to go back to the gate and wait for a replacement crew. Finally got to our intended location, but the car rental place was closed.. Everything ended up great, but what a beginning to that trip....