Tsar Bomba ...

Channeling Strangelove, Tsar Bomba

A Tsar Bomba-type casing on display at the Sarov atomic bomb museum, Sarov

The blast

The nuclear arms race that originated in the race for atomic weapons during World War II reached
a culminating point on October 30, 1961, with the detonation of the Tsar Bomba,
the largest and most powerful nuclear weapon ever constructed.

It could have been 100 megatons, not 50.