I have this transition where I move an object over the X axis from the left point to the screen to the right point.
It's keyframed like this:
1 2 3 4
1) moves quickly near the center = 10 frames
2) moves slowly across the center = 30 frames
3) moves quickly to 4 = 10 frames
For some reason, in the middle of this timeline the object bounced back slightly to the left, and then continues. If I remove the outer two keyframes, no bounces happen. If I move the inner two keyframes, nothing happens. Only with these four. I didn't see any strange curves in the Graph Editor. What is going on? :|