Not that I necessarily agree with Southwest's policy (and I'm a fairly small person: 5'2", 120 lbs), but it's not a weight issue. It's an armrest issue. If you're grossly overweight, but can get the armrests down and not spill over into the other seats, you're fine. If you need a seatbelt extension, you're fine. The only issue is spilling over into the other seats with the armrests down. It can happen to a very wide, but not very fat person. It doesn't matter if he weighs 235 or 555; get the armrests down and don't spill over. Apparently, they didn't follow their own policy in this instance. The armrests were up when he sat down and didn't bother to put them down. They decided he couldn't get them down without ever checking them. It's happened several times, but this is the first "celebrity" to whom it's happened. Check out The Consumerist on this issue.