One of my three air tanks under my driver's seat of my 2006 Volvo 780 exploded the other day! It just blew apart at the welded seams. Fortunately, I was only going 20 or 25 MPH at the time, and quickly pulled over.
I was towed to Lake City, FL for repair, but they had to order a new tank, so I was down a full 24 hours.
Damn Aluminum!!! It should have been made out of steel, then this would not have happened, most likely.