aduros/flambe — comment on commit 891b24f8898a82915a091620dcf07ca7fe3f7242
File:  line 0
By groves:

I'd been planning on doing this as well, but one thing I wanted to do was to "snap" to keyframes. When it crosses over a keyframe, it actually hits that value instead of interpolating between it and the next frame. With this, if the artist has gone to an extreme value at the keyframe, the animation can skip over it and look off. At least that's the theory.