Ninja Mouse to the Rescue!

Bizarre thing happened the other night at 0300. I woke up and heard a very loud "squeek, squeeeeek, squee-eeek!" I thought the mice were fighting, so I go to the bathroom (where they are housed temporarily until I build a cat safe shelf) and see the door open. Uh-oh! Look in the door and see the lower door of the cage is open. More uh-oh! Try to focus eyes and count mice. One. Move bog roll tubes. Still one. Move little grass hut. Still one. Dig around in bedding. Still one. Oh shit! Where is mouse #2?
Look on floor, start moving laundry around. Hear really loud "SQUEEE-EEEE-EEEEK!" from kitchen, run in expecting the worst. What do my very tired eyes see? One yellow cat crouched down looking at the wall, kitty corner (pun not intended) from him there is a torti cat crouched down looking at the wall. Up against the wall, one tiny mouse, on her hind legs, little paws extended in karate stance. "Squueeeekkk! Squeeeek!" which I guess is the mouse equivalent of "Hi-ya!" or "Bring it on drool face!"
I grabbed her and put her back in the cage. Luckily she is just missing a tiny patch of fur on the back of her neck and appears to be otherwise uninjured. Of course, I had a really hard time getting back to sleep after that excitement. Last night the instigator torti cat, Allegra, figured out how to open the bathroom door, so I had to move the mice to Ryan's room.