MRIs

Why did that guy's pants rip open?

It didn't rip open, it's easy access.
- Easy access in or out?

When the bloodletting and leeches haven’t worked it’s a quick bake to kill the demons

The thing on the head being in front of the opening as opposed to in it is really bothering me

Edit: the more I look at this, the more ridiculous it gets. That man went and ripped his pants. Also, am I the only one that sees Steve Buscemi?

The two figures in the back also have the circles around their head, and the one on the poor fella is clipping his hair. I'm going to assume this is not original

I stand corrected

Edit 2: I can't stop staring. The wooden legs don't match (I can't see any way of them being angled the same), and apparently if you take those skinny ass shoes off you get big toes the whole way down. Also, where are his nipples? My man in red has his chin behind his shoulder. Some sort of cremortionist

The thing on the head
It's a halo. Are people unaware of what halos are?
- They get depicted pretty differently in old art than they do in pop culture.
- Yes, I am unaware that the solid object matching the wall was a halo. I had already thought of that but I have never seen one drawn in this way
  Edit: Looks like using the wall texture as a halo was in fact a thing
(IMPOSSIBLE)
Big bonus points to anyone who legit updates that Wiki caption
- Holy human pizza.
- Have we explored the idea that they are pulling him out of the oven?
- The martyrium of St.Veit, Museum Belvedere, Austria.
cremortionist hath slain me.
can't unsee the circle thing
- I can't figure out what it is. It matches the wall the other two are against

Yes, It is MRI... Man Roughly Incinerated.

Not to be too mean to medieval artists, since they're much better at art than I am, but why do they always have such weird-ass anatomy? Would it have been that difficult to have someone pose for reference?

You'll need to find an extended explanation on your own but in essence - religion. The focus is on symbolism, and not on realism as it diverts attention and doesn't help you describe scenes from the bible.
I remember seeing some examples of paintings made by the same artists for secular and religious purposes, and the secular ones were realistic. But it's been quite a few years ago and the only thing I remember is that they might have been Italian painters working in the Eastern Roman empire that were recognised due to the messed up alphabet.
The artist had a model. but he moved too much in this scene and they didn't find another one willing afterwards.
https://en.wikipedia.org/wiki/Reverse_perspective
It's meant to be viewed at a distance. :)
- Reverse perspective is more about symbolism than distance AFAIK
- Still doesn't explain red guy's contorted limbs and head, though.