The southwestern window of 54-100 blew out on Thursday around 8:30 p.m. because of high winds. The Cecil and Ida Green Building was designed in 1962 by architect I. M. Pei ’40, the same architect who designed the John Hancock Tower in Boston, which is famous for its original glass panels cracking and falling out in high winds. Pei did not respond to an e-mail sent late last night.