I had this technology on my old 67 pontiac 326...
I let it overheat one night on my way home, backed it up the driveway, shut off the ignition, and it continued to run.
Dropped it into gear, it chugged and continued to run. Back to park, popped the hood and removed the air cleaner, attempted to suffocate the carburetor, but couldn't manage to block all 4 barrels with my hands, and the engine was glowing red as it continued it's endless chugging. Finally I panicked and grabbed the garden hose. As I sprayed the iron block, the chugging finally stopped and was replaced with hissing water and metal pinging.
I dropped a new engine in that car the next weekend.