Anyone watch Myth Busters last night?

They were testing the "myth" that water heater could damage a house.

They built a small one room 'house', installed a 40 or 52 gallon water heater (I forgot which it was), set a tub in the 'house' with a female mannequin in the tub, ripped out the thermostats, capped the T&P opening, then applied power and waited ...

At right around 335 psi pressure, the tank blew.

It went way far up in the air (a technical measurement) and, when the tank blew and the hot water went from 335 psi to atmospheric pressure in a fraction of second, the boiling point of that water water reached in that same time frame, and the expanding steam force literally blew that small house apart.

*They were shocked*, if only they had called me , I would have told them 'Well, what did you really expect? THAT is EXACTLY WHY T&P safety relief valves are REQUIRED. 'Exploding water heaters' are not a "myth", they are "real".'