You dont get a good sense of scale in the video.

Is still likely when in 1946 a ship loaded with nitrate fertilizer caught fire dockside in Texas City, near Houston. It is believed that when hosing the fire with water did not work the ships captain ordered the hatches closed and had live steam pumped into the hold. Since no one on the ship or dock survived this is strictly conjecture.

The Tsar bomb was bigger than planned. A recent study puts the blast at over 75 Mt. It was a pys. and politcal blast. The Russians and the US, castle Bravo shot, where both very lucky. Both shots where much bigger than planned. Researchers, on both sides, took a real hard look at their testing programs. Bob

Uh... if you're on the receiving end, does size of the nuke really matter?

Depends on if your 5km's from the impact or 10....