The top mistakes in Alvin and the Chipmunks meet Frankenstein http://www.moviemistakes.com/film4142 en Sat, 06 Mar 2010 06:55:22 +0000 56016 When singing the song about what they would do if the monster came to their room in the night, Simon puts on Alvin's duvet/blanket as a cape. It then shows an imagination sequence where the blanket is a correctly sized cape to fit him. When it returns to the real world, the 'cape' is the size of his imaginary cape, nowhere near the size of the bed.