At least he didn't pull it with his teeth.
Security Cam Captures Man Falling Down Stairs, Accidentally Pulling Fire Alarm

Because a first day on the job is always chockfull of pitfalls, this is a video of a man tripping down the stairs and accidentally pulling the fire alarm on his first day at a new gig. Those fire doors shut QUICK. I doubt he was fired for the incident, but I can’t imagine him being fast-tracked for a corner office either. “Kid’s a liability,” I imagine his boss noting while putting his file in the “Never to be promoted” pile.

Thanks to JustA, who agrees stairs can be tricky.