I broke my toe just before flying from Portugal to London. I had crutches and was given a wheelchair in the airport. I technically could have walked, it just would have been extremely painful. When the staff at Luton told me that it'd be an hour before the passenger lift was ready, I decided "fuck it" and that I would walk down the stairs instead. One of the other passengers accused me of faking the whole thing, but I can assure you that I was not.