Funny video shows a dog who won't go through a screenless screen door.
UPDATE Claudia points out that cats (Dutch, ones anyway) are as clueless as dogs when it comes to screenless screen doors. Link
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects