From [FourFour](http://fourfour.typepad.com/), home of earlier [No Signal supercut](http://johnaugust.com/archives/2009/no-signal), comes another montage of movie tropes, this one involving [medicine cabinet mirrors](http://fourfour.typepad.com/fourfour/2010/02/mirror-scare-a-supercut.html) and their kin.