Looks like the shaft broke. Ive had one come off because I didnt pull on it before I went on the track. That will never happen again because I didnt enjoy the end result. Kinda like leaving the plug out, usually only happens one time.
"Dude, the steering wheel came off"
"What??"
"The steering wheel came off"
"Well PUT THAT BINCH BACK ON!!"
"I'm trying, ok.. here we go."
"Whew....giggles"