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This might go down as one of the best April Fools pranks of all-time.

Some college students pulled a fast one on their Macroeconomics professor.

Related: He might want to think twice before trying to pull a stunt like this again

The professor had a policy that if your phone rang in class, you had to answer it on speakerphone.

The students arranged for one of the female student’s phone to ring and the caller would¬†indicate that she was pregnant.

The teacher felt horrible and offered an apology, to which the student replied, “I already know what I’m going to name the baby…April Fools!”