Atomic Test Baker

In Operation Crossroads, the US detonated a nuclear device in shallow water amidst retired allied naval vessels, along with captured Japanese and German ships.

Is the dark streak on the “mushroom stalk” at time index 0.56 in fact a ship knocked vertical by the blast?

yes, its the battleship U.S.S. Arkansas.
Wiki link> Operation Crossroads - Wikipedia

Most Disappointing Thread Title. I wasn’t thinking Able/Baker/Charlie… I was thinking of someone from Good Housekeeping setting out brownie batter on the Trinity range and seeing if you could cook it in a fraction of a second…

Well, there was the case of the atomic scientist who lit a cigarette with an atomic bomb…

Warning: The Surgeon General Has Determined That Cigarette Smoking Is Dangerous to Your Health

You can see the ship clearly at about 0:51 before the spray engulfs it.