There is a CR2 that flies MSP-LEX-MSP or LEX-MSP-LEX, if you prefer, that has a seatbelt in 2A that literally will extend into the aisle. I don't know if this is the designated super fat person seat(s) but you could easily put a quarter ton person in both 2A and 2B and he could be belted in from A to B. I've sat in that seat at least a half dozen times and I always get a chuckle out of it.