(Two reasons, one is if you've put it in a odd way and it keeps trying to "balance" itself, The other it's just twitching every now and then for no actual reason! Also sure-)
(oh- okay. so yesterday this kid he was like...4 at the party, he was going down the bouncy castle slide and he uh...placed his finger right- righttt- in my- b-b-budussy-- AND MY FRIEND JUST COVERED M MOUTH CAUSE SHE KNEW I WAS GONNA MAKE A SUS NOISE-)