A monkey's paw is a talisman that grants wishes but the wishes are usually granted in a way not expected by the requester, usually as a punishment for tampering with fate.
Here, the guy requests "make me a sandwich", the monkey's paw would grant the wish by literally interpreting the wish.
If you want to see more, there is a subreddit called /r/monkeyspaw. Not sure if there's a community on Lemmy.
I would assume so but it seems like it could be problematic for some compatibility as you're not switching users and weird options being passed into something like sudo or run0 seem dangerous to me if they have different ways of parsing the input (which they might not).