The Legend Sean Matthews's blog: "New Level Up Requirements"

I just found out to level up to level 20, I have to jump up and down on a 3/4s inflated WNBA game ball used in a LA Sparks playoff game (any LA Sparks playoff game will do) in a pattern including a 3 to 1 ratio of left footed jumps to right footed jumps while juggling a running chain saw, a half eaten marshmallow peep (pink, not yellow), and a mylar get well soon balloon.  In addition, I must be chewing grape Bazooka Joe bubble gum without reading the comic, wear a flannel tuxedo with a striped lace cumberbund and have my hair cut into a mullet with the word FUBAR etched in the back of my skull.  I should be level 20 any time now!