Thanks for the feedback, guys and gals - Lyra, you are too funny! I wish I'd been thinking more "Lyran" so I would have tested the situation more...even casually walking by the table to get a closer look 
But yeah, I have to say, this is the weirdest thing I have ever seen. Like, ever.
I'd be willing to buy that the woman was drugged out or something...but....
Has ANYONE who was ever drunk, mushroomed out, or whatever sat stock still for fifteen minutes with their arm raised in an uncomfortable, bent, position holding an object with liquid in it (I'm assuming it was coffee---in a mug, anyway) without moving an inch? Doesn't the body usually relax? Or if it goes rigid, as with some form of paralysis problem with a medical condition, wouldn't the body go so rigid that it wouldn't be able to be holding a cup with liquid in it suspended at an uncomfortable angle in the air? I mean, that wouldn't normally be possible, would it?
Have you ever seen one of those British caricatures of someone drinking a proper cup of tea in the formal English way, and when they hold the teacup, their arm is kind of up in the air and the pinky is extended? Well, this woman's pinkie wasn't extended, but her elbow was up really high at an odd angle for lifting a drink.....so her elbow and arm weren't just slightly extended outside her body, they were really sticking out high and far at an angle that was unusual, like she had lifted her arm all the way up her body as she brought her mug close to her mouth. And in this case the mug wasn't quite near her mouth, it was sort of suspended in mid-air on its way to her mouth. So imagine the arm and elbow stuck way out, the cup half-extended towards her mouth, and someone just frozen that way - for fifteen minutes - without her friend once looking at her or acknowledging what was happening. I mean, it was seriously messed up!
And over the course of fifteen minutes there would usually be some BLINKING, but I didn't see any as I looked. At first when I watched this woman I was kind of doing it out of the corner of my eye. Then I got bolder and just sat there fully staring back in sort of a "Gee, what have we here, are you okay?" frame of mind, beaming genuine good intent towards the woman....and I watched very carefully. NO BLINKING while I was watching.
Now I wish I'd seen the exact moment when the woman "turned on" again. But unfortunately I wasn't looking at her in that exact moment. It could have been a couple of minutes, maybe two at most, that I missed. But right after that she was behaving normally, I could hear her talking with the other woman, no slurring of her voice, nothing weird or hyper or drugged out going on (that was obvious to me, anyway - unless I was missing something.)
And no, her dining companion didn't have cell phone ear buds on unless they were the size of tiny hearing aids or something, because her hair was pulled back and I could see her ears very well. Keep in mind than the woman who was talking the whole time was probably less than six feet away, with her frozen friend sitting just a little farther back. The tables were pretty close.
It did cross my mind that they might have been responding to an energetic thing...which I can't take credit for. My honey was sitting with his back to the ladies (too bad, because I don't think he entirely believes my description of the weird stuff I saw, even with our extremely weird adventures that we've shared!
.....and he's been doing some major clearing and meditating and extending his auric field lately, and I think a lot of times his field is still pretty far out and extended when we're out and about in a public place. He's a gifted healer and energy sensitive who is WAY more powerful than me when it comes to directing healing energy through his hands - we joke that he must have been a "bull shaman" in a past life because his own abilities came to life so quickly when he first developed a sincere interest in learning healing techniques. His field is so strong these days that he's unconsciously doing a lot of St. Francis of Assisi stuff with conjuring up animals that just magically appear and want to give him love, it's really funny and cute. Animals are a good litmus test for positive energy - even half feral cats come up to him and behave like tame old squoozy wuzzy pusscats around him lately.
I, on the other hand, have been a lazy slob when it comes to doing any major self-clearing or meditating for a couple of months - too obsessed with work and other stuff. So it is entirely possible that his energy field was the one that was carrying a strong vibration that whacked the one woman out for a bit there. When she unfroze, by the way, she seemed perfectly happy and in good spirits as she resumed her meal with the other woman. Maybe she'd gotten some good energy? Hope so!
LipstickMystic aka Jennifer