First-year students attending a chemistry class at the University of Rochester were recently duped by a fellow student pretending to be their professor. He had them completely fooled — but then the real professor showed up asking, "Who the hell are you?"

During the prank, UofR senior Patrick Adelman of the Chamber Boys online radio show told the students that 55% of them would likely fail, that the vast majority of them would never make it to med school, and that laptaps and cellphones were strictly forbidden.

Eventually, the real Dr. Benjamin Hafensteiner (who was recently named Professor of the Year in the Natural Sciences) walked in, putting an end to the charade.

[Via Laughing Squid]