Any small sensor that does anything interesting for me? Requirements: For prosthetic learning it must react fast and the signal should change with muscle/body movement.
How I wire the signal to my body is antoher issue, but first show me an interesting sensor. Best I can come up with is remote temperature sensing, still booring.
Our body is pretty good at all the relevant stuff of our physical world :). And in the digital the interesting stuff is high-level or can be automated or removed.
Also, flaky sensors too. My mother recently had a couple of episodes of BPPV[1], and in the process I found that a lot of people have it at some point in their lives. A friend of ours had vertigo for almost a month(!) and was absolutely incapacitated.
[1] https://en.wikipedia.org/wiki/Benign_paroxysmal_positional_v...
Flaky sensors is something else, when a sense breaks down it makes very much sense to replace it.