Man intrudes into the house and takes woman with her kids hostage. I do not understand the meaning of tremor here. If it's quiver, how can you swallow it? Is it bile? Or sour saliva? Thanks for help.
“Nice place you got here.” He turns back with an appreciative nod, and I swallow down a sour tremor. His words are pleasant enough but not his tone, so hostile that my nerves stir with fright. I can hear the thoughts tripping through his brain. That we have too much. That he has too little. It’s such an about-face from his demeanor in the garage, calm and matter-of-fact even when waving around his gun, it makes my legs go mushy.
Kimberly Belle "My darling husband"