Apollo 13 CSM oxygen tank explosion 13th April 1970.
We all know what happened, and in particular the wonderful ending, but we can now see this spectacular footage from the Lunar Reconnaissance Orbiter which recreates the view from Apollo 13 on the far side of the Moon.
Embiggen and enjoy!
LINK
FWIW My neighbour, presently stranded in Oz, tells me that she can't get used to the 'upside down Moon'.