Well. This is for a hard sci-fi fiction. The main protagonist, an Action Girl, has just met her sidekick: an humanoid Iguana (it makes sense and it is explained why Iguana-people people exist (has to do with a lab accident) but I feel like it is not relevant for this question.
A nice thing to say about this iguana people is there they are more "iguana" than people. They the size of your average human (when stading on their hind legs, but they prefer to walk on all fours). They think like people (well... They are A LOT more violent than your avarege human and don't understand some abstract terms very well...But they're not mindless beasts), but they still run strongly on instincts.
And. At this part, the protagonist got attacked by this Iguana guy thing, and they are fighting, and she needs to render it uncapable of figthing back, but still conscious. But, acording to science, the usual ways seem to not work:
A punch to the liver:
The scale plating on it's belly is going to protect it.
Inside of the mouth:
Maybe... But the protaginist is not wielding any weapons on this scene, and I think she is not dumb enougth to put her hand inside a mouth full of teeth that can cut her arm off neat. Since instinstinct is a big a part of the Iguana people, do this would decidely be a dumb idea.
A kick to the crocth:
It might surprise the creature a bit? But I don't think this would WORK, ...since Iguanas have all their organs on the inside, plus lots of scales plates protecting the area (and humanoid or not, it's a IGUANA, so the cloaca opening would be at the base of tail, not between his legs. One idea is that the force of the impact was enough to break his pelvis, but that would be very impratical for the rest of the plot.
So. arcoding so Science! what is the best way to render it unable to figthback, but still able to speak to you? How? I don't think repitiles have many weak spots, besides their eyes, of course,but blinding the sidekick would ALSO be impratical for the story.
Of course, I could also just make up an obivious weak spot, but came on. This is sci-fi, ACURRATE sci-fi, (well...Sorta) so I wanted something sciency to explain it, instead of just some "this is a massive weakspot because the author needed one".
Anyone here is a herptologist of sorts and can lecture me on iguanas weak spots?