Incredibly funny

Saw this on Facebook and almost giggled outloud during my mucosal immunity lecture.  Which is far from funny.  And please don't ask me what I was doing on Facebook during this all important lecture that assumed that I did the required reading (except I had the new edition of the book and the required reading was out of the old edition...soemthing I didn't realize until about 15 into class...)

BTW - We can add a skill to my "what I've learned in vet school" list.  I can now spell "diarrhea" accurately.