jon hamm is pictured here in the university of texas at austin yearbook for 1990 -lrb- left -rrb- - the same year he was allegedly involved in a sawing motion ' , causing ` great pain ' .
the pledged then claimed that hamm led him to a basement ` pit ' where he slammed the junior 's face into the ground while he was doing push-ups and then allegedly stood on his spine with his full weight .