When I was younger I used to believe that the mirror was really a whole different world...and the only reason I couldnt enter it was because my reflection was blocking me (everytime i put my finger to the mirror, my reflection put ITS finger to "BLOCK" me) I would try and sneak up on my reflection and push through and i would get really frustrated when i couldnt get through. In fact I think i threw the mirror and had a hissy fit one time.
A childhood belief about mirrors

you weren't the only one
60 of you believed this