Stomping at the Glass

My toes wiggled against the carpet, and suddenly I was standing all on my own! I saw another girl trapped right behind the big dark mirror frame, staring straight back at me. Where was my unicorn?! I stomped my bare foot hard on the soft floor and slapped both hands against the cold, smooth glass with an angry gasp. The girl in the mirror slapped right back at the exact same spot! I huffed, pressed my nose against the chilly glass, and refused to budge until she answered me.