Shit!

A local academic, walking into his assigned lecture hall on the first day of class, suddenly began exclaiming, "Shit! Shit! Shit!" much to the astonishment of his students and his TAs. When one of the graduate students approached him and quietly inquired as to the problem, suggesting as well that the professor might be freaking out his young charges, the man simply repeated his assertion, "Shit!" and pointed to a seat in the front row where, just as he had noted, there lay a heaping pile of shit.
In the twenty minutes it took to get a janitor to remove the awful offal, the professor, no longer burdened by his unique knowledge, embarked upon his own scatological journey into the bowels of American history. His students, perhaps including the Mad Defecator himself, were by all accounts quite sad to receive no reprieve from class.