Sometimes astronauts just wanna have fun!

The video above was taken during the Apollo 17 mission on December 11, 1972, when astronauts Gene Cernan and Harrison “Jack” Schmitt  went off in search of lunar samples during an EVA (short for Extra-Vehicular Activity.) Enjoying the 1/6 gravity, Jack felt the urge to break into song. And can you really blame him?

Apollo 17 remains the most recent manned Moon landing and the most recent manned flight beyond low Earth orbit. It was the eleventh and final manned mission in the American Apollo space program. Launched at 12:33 a.m. EST on December 7, 1972, Apollo 17 was the sixth successful Apollo lunar landing.

Jack Schmitt is the only scientist to have visited the Moon, as well as the only person to have walked on the Moon who was never a member of the U.S. Armed Forces.

Here’s another EVA footage of Schmitt kicking a boulder downhill in the low lunar gravity. (Well he was a geologist!)

Video credit: NASA