PAM?? Ewww. lol
My husband said he thinks she is hiding under the couch because she feels like her poop is chasing her when it does that...and stays hidden until mommy comes and "rescues her" from her poop.
Her 'bum hair" is clipped really short now and it still does this. It's definitely not 'stuck' in her hair...I think she just runs off before she is completely done and doesn't realize it's still 'in there' (sorry to be gross).