Particle Emitters - Rotate Particles on X-Axis...?

Right now, the Fall Leaves particle emitter in Motion 4 causes a series of leaves to fall facing the camera.
I'm wanting each leaf to flip individually on their X-Axis, making them fall more like actual leaves.
How do I do this?
I've just adjusted the particle emitter to be 3D *as well as checked off the Face Camera option in the Emitter pane, and still have not seen a way to make this done.
I can adjust the axis in the Fall Leaves Sequence the emitter was made from, but it flips each leaf the same way.
Can this effect be done?
Thank you for your help!

Here's what I'd do as a possible solution. Duplicate the image sequence several times (4-5) and add them to your emitter. Lower the birth for all of them until combined you have about the same number as before with one.
Then apply the randomize behavior to the X rotation of each of the duplicate image sequences. Give them low frequency and noise settings, but make each behavior slightly different. Also set the start X rotation for each duplicate to a different point.
Now you'll have about 4-5 random changes in X rotation. This should help trick the eye into seeing more naturally occurring leaves.
Andy

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Thanks MTD,
It is indeed one good trick ...
From your timeline, it seems that you applied a transition after each clip. Can I know why & what transition you applied ?
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Particle Emitters - Rotate Particles on X-Axis...?

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