Best student’s April Fools prank on professor ever?

A group of college students banded together to pull off possibly
 the greatest April Fools’ Day prank ever.
Dr. Stephen Barrows is an associate professor of economics
in his second semester at Aquinas College.
 The prank was inspired by Barrows’ seemingly harsh cell phone policy.
The video starts with a message:
“Our professor has a policy that if your phone rings in class,
you must answer it on speakerphone.”
So the students started brainstorming a way to prank the professor...
and this is what happened:

More here