Hacker News Reader

Yes, I think it’s a well-known phenomenon that the brain extends its concept of the body to tools, vehicles etc that you learn to use well.

Yes. My rifle feels like an "extension" of my body. Also, when I drive my car I will focus on how the car feels like an extension and the scale of objects feels different. Like if I am walking down a long street it feels big, in a car it feels small.

I actually think drivers routinely experience this, which explains a lot of road rage.

Yes. I think the concept you’re describing is proprioception:

https://en.wikipedia.org/wiki/Proprioception

Proprioception could be the basis for a thinking man's version of the sci-fi trope "exchanging bodies".

A cell phone vibrating in your pocket: in the first days, after some days of use, many people would feel it vibrating as a muscle sensation, not as external thing vibrating.

I experience "having something in the copy/paste buffer" as a distinct sensation in my Ctrl-V hand.

Itchy Trigger Finger: Cyber Edition

Which can lead to phantom ringing syndrome.

Some overlap with ideas of Marshall McLuhan. Media as extensions of man.