The bug crawled on the sides of the house and fell down while the door opened to be seen from inside. Another piece of animated work by Lynch, which usually can be described that sequences happen one after the other. Well, things have to be continued so a film goes on.
would you believe it is in fact, the university that Toshio Matsumoto taught at, there's a little pin in google maps that you can look around in roughly the place where this footage was shot.