This a funny part of the movie Monty Python Search for the Holy Grail...

Panzerlied!

English translation~Panzer Lied (Tank Song)~
If there's storm or it snows, Or the sun smiles on us, The day is burning hot, Or the night icy cold. Dusty are the faces, But joyful is our mind, Joyful our mind; Our tank roars ahead Within the storm wind.