Motion blur to sped up footage in Motion?

Greetings.

I use Motion infrequently, but may have a particular use for it if it has this capability.

I have an action sequence in my film in which I have sped up a quick shot. It is a head turn that needed to be increased in speed 200% to match the pace of the sequence. The timing works very well now, but the motion of the head seems unnatural due to its speed. Frankly, it looks sped up. Not that the speed seems unnatural, but the lack of appropriate motion blur.

I know that Motion is capable of creating frames between frames in slowed down footage. Is there a function that can add motion blur to footage that has been sped up?

All input welcome, and I appreciate your comments and suggestions.