My gas water heater is on borrowed time. Banging noises every night and the thing is 17 years old. Gonna replace it pretty soon! In my experience though, you can have one make the banging/rumbling noise for YEARS before they give out. This one's only been makin' noise for a year now.
You couldn't hear a dump truck driving through a nitro glycerin plant!
Badasses might screw with another badass. Nobody screws with a nut job.