A college student walks into his Ornithology class and finds five birds with bags over their heads so only their feet were showing.

"What's this?" he asks.

"It's an exam," explains the professor. "Your job is to identify each bird by looking at its feet."

"This is a really stupid test, you know that?!"

"What's your name?" demands the angered professor.

The student takes off his shoes and answers...

. . . . "How about you tell me."