Wiki: China Syndrome, a term used to describe a fictional Nuclear Meltdown

"China Syndrome" is a term used to describe a fictional Nuclear Meltdown.

http://en.wikipedia.org/wiki/China_Syndrome_(nuclear_meltdown)#China_Syndrome

The China syndrome (loss-of-coolant accident) is a fictional nuclear reactor operations accident characterized by the severe meltdown of the core components of the reactor, which then burn through the containment vessel and the housing building, then notionally through the crust and body of the Earth until reaching the other side, which in the United States is jokingly referred to as being China.

I saw this term in the this video.