My Mouse named Junior

This might seem weird to you but I found a mouse in our backyard and I played with it.  Yes this is true even see the image.  My sis named it Junior and I like his name it's cute!  So this is what happened, I was outside doing my usual exploring and I found a creature.  I brought it out from underneath the trees and it just layed there on its back staring at me!  I found Junior twice in a row and we actually got along both times.  He was so much fun but now I cant seem to find Junior...