Barre Chords
One of the things that seems to make playing guitar so difficult is this strange contortion of fingering known as the barre chord.
Basically, to play one of these things, you lay your index finger across the neck of the guitar, depressing all of the strings against that fret. At the same time, your other fingers are pressing strings to the board in order to get an actual chord, since all of the strings at the same fret do not a chord make. (Why??? I don't know...)