Oton Bačar posted this video some time ago on Vimeo, it has gotten some attention recently and thought it would be a good way to check out Twixtor. Twixtor is a plug in for FCP that will either speed up or slow down your existing footage. Here is a rip from Apple’s site.
Enables you to speed up or slow down your image sequences with visually stunning results. In order to achieve its unparalleled image quality, Twixtor synthesizes unique new frames by warping and interpolating frames of the original sequence… employing RE:Vision’s proprietary tracking technology that calculates motion for each individual pixel.