Hey guys. first post here. I was recently rereading mistborn again and I was on the fight scene between Vin and Shan. It goes like this,
"Shan slashed, and Vin felt a flare of pain in her cheek as she dodged.
She dropped the staff in shock, reaching up to her face and feeling blood. She stumbled back, seeing the smile on Shan's face.
And then Vin remembered the vial. The one she still carried-the one Kelsier had given her.
Atium.
She didn't bother to grab it from the place she had tucked it at her waist.
She burned steel, Pushing it out into the air in front of her. Then she immediately burned iron and yanked on the bead of atium. The vial shattered, the bead heading back toward Vin. She caught it in her mouth, swallowing the lump and forcing it down."
I have 3 problems with this. I being the nerd I am, drew a diagram to scale by hand, then modeled it in CAD (autodesk fusion) the cad is better and undoubtedly more accurate so I'll only show it. ↓
in this diagram I took some liberties with measurements but 63" is average height of a female, and most humans are 8" spine to belly button, especially because she is described as slight, and the 45" mark is her center of mass (or self) best I could figure based on average proportions, and the 36" mark is her hips (where her metal is) by similar reasoning. The diagonal dotted line is the line made by connecting the 2 points, which is the vector the metal would be going on. the curved line (spline) is my best guess at attempting to fit the metal path into what is described. The reason it varies slightly from the vector is due to gravity. The circle is a very rough estimate at her head dimensions and the chord of that circle being her mouth.
with the description out of the way we can now address the issues. Firstly the initial push, she pushes it directly away from her and "into the air in front of her." How does this work. we can only push directly away from the center of self. You might say that the center of self is lower than that because its modified by perception heavily, but to do as described it would ideally be below the object being affected, which is in her waist(band). This seems incredibly unlikely, especially because it's normal for the rest of the fight.
Next is the pull sequence. After pushing the vial "into the air in front of her" she then, "immediately burned iron and yanked on the bead of atium. The vial shattered, the bead heading back toward Vin. swallowing the lump and forcing it down." Here more problems arise. From the diagram drawn it would be entering her mouth at a a very high speed and a very steep angle. The speed comes from the shattering of the vial. admittedly, this detail was likely just a writing tactic, so she isnt swallowing glass, but I fear he's created a far greater problem. I just did some calculations and the nugget is likely moving at 90+ mph. this is bad. catastrophic even. I made this under the assumption that the vial was tempered glass (they jump all over w/o them breaking) and the nugget was about 0.5-1 cm in diameter.
So we now have a bead about the size of a small caliber bullet heading at breakneck speeds over a short distance directly to her hard palate. After some research I'm actually unsure if it would break it. If it did, that would go straight to her brain which feels like a problem. thoughts on this? I know that I'm lacking in the physics area and anatomy area. any insights from yall?