About 1/2 a mile later, I found out that noise was the engine... out of oil... completely seized up... dead.
So do you know yet if it's totally fried yet or did you get away with just having to add oil? That's a hell of an awful run of luck. Hopefully it changes soon. If you need a new engine, hit me up, I'm prepared to let mine go cheap, I need the space in the garage.