Changing planes at Sky Harbor in Phoenix, Tricia and I were the last off. While we waited for a wheelchair for her, I chatted with the skycap, who apologized for our having to wait.
SKYCAP: We had requests for 9 chairs on this flight and we brought 7. That's why there's a delay
ME: That sounds like a lot
S: It is. Usually for this flight they request 7 and we bring 5
M: You mean there are people who need a wheelchair to get on the flight but walk off on their own?
S: Yeah. The flight attendants call them "jetway Jesuses"