Double Attack of the Yin-Yang Brothers

I was letting Panther spend the night in my room when Yin-Yang came running in behind me and tackled me to the floor. I closed my door (Jennifur would probably attack the kittens if we left them roaming at night). I got into bed and then jumped out. Turns out the ninja kitten brothers were hiding among my sheets. I got them out and went to sleep. At about 4 or 5 in the morning, they woke me up by sinking their claws in to my chest. I wasn't hurt but lost some sleep.