[enraged_camel]

Yep, came here to post this. The funny thing is that there was a post about that video a while back, and the HN crowd criticized it pretty heavily for being a bad way to explain gravity. But... whatever. :)

[mturmon]

Here is the discussion, which was interesting but inconclusive about the merits of this rubber sheet model: https://news.ycombinator.com/item?id=8542244