Michael J. Fox reenacts a 25-year-old scene from the trailer for Back to the Future. Start both clips at the same time to see the old and new versions side-by-side. (Via Blame it on the Voices.)
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. Come and hear Mark speak at the ALA conference in Chicago on July 1.