In response to your prenatal inquiry - yes, it's been rather fascinating as someone who has never been with child. I am constantly surprised by what feels wonderful and not-so-wonderful in their bodies. Adding to the equation are these factors:
1) None of these women ever tried yoga before their pregnancy. They are absolute beginners with everything ranging from hesitancy to full out skepticism.
2) Our room has zero props, minimal wall space, and is not a yoga studio but rather - a hospital conference room in which I am not even able to dim the painfully florescent lights.
3) Class is super short - only 55 minutes, several of which are spent going around the room talking about how they feel that week.
Teaching prenatal (or beginners for that matter) with the availability of props, walls, and more time, would be an entirely different situation. I know that when you were pregnant with Terrible Toddler, your practice was quite similar to pre-pregnancy, but these women didn't have a practice that came before. It's all brand new, complete with low back pain, upper rib cage compression, and a big belly that gets in the way. This class has forced me to put on my make-believe baby bump, as well as my thinking cap, and just get creative. It's also helped me remember that I must stay open-minded and not overplan.
As for the rug burn on your booty-bone, oh my! I'm sorry this happened but it's kind of hysterical. Maybe the knowledge of it being painful as it grazes the mat, will help you scoop up through your mid-section even more as you jump! This could be the momentum you need to clear the floor each time!
I am unfortunately all too familiar with tailbone injuries. I'm sure you remember when I took a fall on the concrete last year and cracked mine. That thing took ages to heal and still flares up on occasion. My injury brought an almost problematically intense awareness to the base of my spine. Ultimately, that awareness was rather illuminating in my understanding of the body. For instance, long after I was able to rock back into Navasana, I was still in pain in Vira 2 or other externally rotated standing poses, particularly when I really drew the buttocks flesh of my front leg underneath me. Go figure.
Has your rug-burned-booty injury led to any revealing anatomical investigations other than an avoidance of couch-asana?....