Quite literally just that. It would flop and jitter around like it was having a seizure or something. I've (mostly) fixed that issue (not entirely sure how), but am still having problems:
Right now I have it where I have an arrow object with multiple frames of animation hovering just above the paddle before my ball launches. Instead of just playing its animation normally I have it calling individual frames and when it calls these frames I have it setting the angel of the ball (that has still yet to launch) to the angel of a bar that's connected to the center of the circle (to move the paddle in the first place) adding or subtracting between 0 and 190 degrees from the bar's angel in 5 degree intervals . IE. if one of the arrow's frames are pointing left, then it may set the ball's angel to "bar.angel+85", for instance.
The animation looks great and nothing is wigging out, but when the ball launches, it always launches the same way, regardless of the bar's position (which would seem like the perfect frame of reference, I thought). Thinking that it was just rotating the ball, I've also tried it with angel of motion both by itself and with the normal angel command. No dice