This faceplant video is somehow even more predictable than most faceplant videos, and perhaps that's why I find it even funnier.  There's just something really rewarding about a voice off-camera repeating the phrase, "Don't fall! Don't fall!" It really is the perfect cue for an embarrassing wipeout on concrete.  These chicks could teach graduate-level courses in comedy. 

And I would totally want to bang the professor.