There was a great project to track the location and size of Michael Jackson's famous (infamous?) white glove across all 10060 frames of a performance.

The data was all placed on whiteglovetracking.com and made available for people to create, well, whatever they wanted.

For this video I processed each and every frame, keeping the glove right in the centre, and stretched/compressed the image so that the glove was always roughly the same size. (Now that I look at the main page I see that someone else did the exact same thing, without the cross-hairs, though.)