Can you actually live in a rusty box?
	We might need something outside it!
	Somewhere less safe

"more" directory:
	Calling a function from C (getpid)
	If you can call a C function, you're on the outside!
	Can get to the outside of Python, etc. this way too
	This is useful for mixed code bases
		Or C libraries without a rust wrapper

What if we want to stay in rust world?
	unsafe.rs
	Can we change y using the pointer to x?
		Sure!
		Rust can totally be used to make a good test puzzle

Finally:  An asm directive!
	Like gcc
	My example uses Intel syntax
		Rust does that by default
		I didn't go figure out how to change it
		Apparently other architectures are AT&T in rust by default

Back to how to use Rust "normally"

mutability:
	Not the default anywhere
	new/mod_loop.rs
		You can have a loop with a mutable cursor
	new/pass_methods.rs
		You can pass a mutable reference to a function
		It'll change the original, as expected
		usize:  Pointer-sized, like size_t

Using dynamic memory and references:
	We can make a linked list