I did check for metaphor before commenting. It'd be odd to describe the chair in question as a "Transformer having a panic attack" if you didn't actually see it. If it was noisy, I might have described it as sounding like a blender choking on concrete, for example.

I have no response for point #1, but it doesn't make my other observation go away.

https://sightlessscribbles.com/about/

> Kingett has Cerebral Palsy, CP, in addition to his blindness. He’s had both ever since he was a baby. He has Retinopathy of prematurity, commonly referred to as ROP. Even though he is ambulatory, his cerebral palsy makes it difficult to walk long distances or to stand for lengthy periods of time, which is probably why writing fell right into his lap!

So it sounds* like he uses his cane from his wheelchair and/or when walking.

*unintentional metaphor