You can walk on all fours without penalty.

Prerequisite(s): Acrobatics +2, Kappa

Benefit: You may move at your normal base speed while prone. The AC penalty against melee attacks in this position is only -2 instead of -4. You may not run or charge in this position however.

Normal: When prone, a character's speed is normally reduced to 5 ft. and the character takes a -4 penalty to AC against melee attacks.