This is a video of a ball being bounced on one of the world’s bounciest surfaces. It makes it sound like some super secret scientific material, but *spoiler alert* it’s just a balloon stretched over a cup. Although they could’ve saved themselves the work of buying a balloon and cup and just used my rock hard butt cheeks instead.

Keep going for the video. It really is surprisingly bouncy.

Source: Geekologie – Balls bouncing on one of the world’s bounciest surfaces