we had to make a animation based on videos we recorded from real life.
The ball was a simple tennis ball we bounced down the stairs.
The bin was actually filled with a cinderblock. it pretty much just fell flopped on the stairs and then rolled to a stop hence the animation.
The last ones were cardboard boxes that I found. I dropped a few down the stairs, they pretty much slammed down the stairs super fast.
It pissed off my neighbors a bit.
Gravity Showcase