RETRANSMISSION TO CORRECT DAY OF WEEK - A crowd watches as a piano falls from the roof of Baker House dormitory at Massachusetts Institute of Technology in Cambridge, Mass., Thursday, April 26, 2012. The annual event which began in 1972 is staged to celebrate the last day students can drop classes without having them appear on their college transcript. (AP Photo/Michael Dwyer)

Associated Press
RETRANSMISSION TO CORRECT DAY OF WEEK - A crowd watches as a piano falls from the roof of Baker House dormitory at Massachusetts Institute of Technology in Cambridge, Mass., Thursday, April 26, 2012. The annual event which began in 1972 is staged to celebrate the last day students can drop classes without having them appear on their college transcript. (AP Photo/Michael Dwyer)
RETRANSMISSION TO CORRECT DAY OF WEEK - A crowd watches as a piano falls from the roof of Baker House dormitory at Massachusetts Institute of Technology in Cambridge, Mass., Thursday, April 26, 2012. The annual event which began in 1972 is staged to celebrate the last day students can drop classes without having them appear on their college transcript. (AP Photo/Michael Dwyer)
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