Super Mario Cat Goes Boing

The first time you see this, it appears that the “Boing!” sound makes the cat jump. Then you realize this is an Ignoramusky video, so the sound is probably synched after the fact. So what’s making the cat jump? YouTube commenters say someone is pulling the rug, but I don’t see that. My guess is that there’s a cricket or some other bug in the rug. (via Geeks Are Sexy)