JoeDoakes- There were two reasons I mentioned his weight. He had difficulty walking, which would seem to rule out any fast movement if he were up to no good, and I wondered if security wanted to be sure he was not hiding something on his person due to his extreme size. He was one row up from us when he finally boarded, and had two seats as well as a seat belt extension. It appeared to me his selection was based more on race and weight than anything else.