A  professor fell victim to a prank from a group of students at Aquinas College in Grand Rapids, Mich.

They turned their professor’s own cellphone policy against him in an April Fools’ prank for the books. Macroeconomics professor Stephen Barrows insists that anyone whose phone rings during class must answer it — on speakerphone.

The students set up a fake phone call on April 1,  and  a female student answered the call, only to have her (fake) pregnancy test results announced to her classmates.

You need to see Barrows’ reaction before (and after) finding out it was just a prank.

Credit: Mashable