The world would be treated to an hour and a half of him wandering around accidentally deleting things, swearing, and attempting to restore them from backups before anyone noticed. He would also have to execute administration commands on a regular basis, for example

# /etc/init.d/gravity stop

or change people's nameservers because Auntie Flo can't remember where Bert is.

He would also have to yell 'sudo!' before doing anything.