"From Rust's point of view, "HellPortal::unchecked_open()" is safe, it's thread-safe, it's memory safe... but it will summon demons that could destroy mankind if the warding field isn't up, so, that might need an "unsafe" marker and we can write a checked version which verifies that the warding is up and the stand-by wizard is available to close the portal before we actually open it, the checked one will be safe."

"The only thing they fear is you"

playing in the background.