Snake is a character in 5712 LEGO Stunt Rally. He was a soldier who kicked out from the army for being too harsh. He now resides in the Jungle, where he likes to race and eat leaves. He drives a green jeep, and is the Jungle Champion.
He was the first military-themed LEGO minifigure, though he did not actually appear in any LEGO sets.
Keeping with his military heritage, his jeep's horn plays a Calvary charge.