Sach's brink (an obvious light weight prop) lacks all the distinguishing manufacturing features of a real brick.
The mild shadow of a boom microphone can be seen moving back and forth on the door in the dean's office as he dresses down the boys after the lab explosion.
At 34:42, the boom microphone is visible, reflected on the windshield of the "woodie" station wagon, as the boys exit it dressed in drag for their frat initiation.