Nuclear bomb. Homemade timer.
/My favorite thing about this incredible and terrifying video of the Baker Shot, a 23-kiloton nuclear bomb that was detonated about 90 feet underwater at Bikini Atoll in 1946, is the countdown timer in the first few frames.
They are detonating a nuclear bomb, and yet the timer looks as though someone has written in the numbers and the word FIRE by hand.