In my last year in grad school getting an MA in Sociology, I signed up for a graduate course in the College of the Arts called Intermedia Workshop that was advertised as being open to all disciplines -- though I am pretty sure they intended it to be all "arts" disciplines.
This guy and I put together the most insane piece of interactive guerrilla performance art in the main Ohio Union ballroom. It was called A Creative Carnival and involved every member of the class. If I can think of a way to succinctly describe what it was like, I'll come back and tell you. An example, we played background music over the sound system that got progressively louder and sped up. Members of the class not directly running an attraction went through the crowd hassling people. The grand prize was a console TV set that was dropped on the floor tube first as it was being brought to the winner. At one point we locked the doors so no one could leave. In the process, we pretty much violated every fire, electrical and building safety code.