His most memorable fan encounter ended with a medical emergency.
"There was this one time, at an amusement park with the whole cast, and this girl was going: 'Kel, Kel, Kel!' And then she started going 'KEL! KEL! KEL!' and she had an asthma attack right there,” Mitchell described of his craziest fan encounter (complete with a spot-on teenage girl imitation). “The ambulance came, and that was a scary moment for me — a scary moment for everyone there."