Today, the Internet told me that I could use nylon string to cut through PVC pipes in tight places... The Internet is full of shit.

They do make a wire saw for that

this is exactly what I was trying to find!

I know! Couldn't find one at my hardware store.

Shit that sucks man

Sawzall works fine for this..

Reciprocating saws kinda suck when the pipe is flush against the corner of a floor joist and a ceiling plate

Excuses.