two experiences with these sprayed on herb's blends.
The original Spice, which contained JWH-018 ao. And thought not much of it, didn't feel it to be honoust. But my THC tolerance is high.
Next time was just for fun, an English blend. Again big THC tolerance. Put in some crumbs, 1/4 of an usual bowl and experienced more or less what you describe. Partial loss of motor control's, swinging left and right while my brain and mouth seemed to function just fine. The results were extremely frightening and I dosed a benzo as I was passing out.
And that when I had Weed on me. Stupid me! The Brit's had made that blend so strong it's been the strongest Cannabinoid exp I ever had till today. And that's something as I started working with the pure synthoid's later on.