I would definitely attribute the bite to stress.
1) the stress of being moved around from car to basket, to dancer, to basket, to dancer, to basket, to car, to basket.
NO snake is going to tolerate that very well. It is VERY stressful for the animal.
Boas prefer to stay in there safe sanctuary with proper temps and humidity. They do not like to travel around in baskets and cars.
Heck, i would probably bite too, if treated like that.
2) Also, I’m sure the snake is very uncomfortable with mites. She just wants to soak in some 80-85 degree water and be left alone. I had a ball python completely cure herself of mites, by giving her a large water bowl, which she could completely submerge her entire body under water except her nostrils to breathe.
She drowned all the mites, and all the baby mites that hatched, eradicating the entire lot of them. All i did was change the water bowl and newspaper daily, and scrub the tank out daily, and let her soak in her “bathtub”. After a couple weeks, she stopped soaking and was cured. Ive never seen a mite since.
You should NOT be taking her anywhere, she needs to be treated fir mites and needs rest. Taking her to dance practice will stress her out snd possibly spread the mites to other animals.