use the radioactive ooze!
In college, I could not sneak out for a smoke or sleep through the anthropology classes. Betil was a forensic anthropologist and a respected primatologist and very very smart and very very strict. You showed up, you turned off the recorders, and you shut up, listened and learned.
Okay that is not my test. Also I am not admitting the “you are hot do you work out?” notes on math tests that terrorized that newlywed math teacher into giving me A’s instead of reading and grading my exams.