With all due respect...
I believe that it is technically a Helium Gas Mine. The helium collects at the top of a pocket or a cave underground. Water seeks its own level, just like helium does.
Two friends Bob and Frank are lost deep in the jungle when they encounter a tribe of blood thirsty cannibals.
They are surrounded by dozens of the fierce blood thirsty warriors armed with clubs and spears. The leader of the warriors approaches the two friends and informs them they are trespassing on sacred land and unless they can prove they are descendants of the Gods they will be killed and eaten.
Bob and Frank realize they have little choice but agree they will attempt any test to try to save their lives.
The chief warrior brings them a bowl full of angry fire ants and drops three small seeds into the bowl. He informs them they must put their lips in the bowl and suck as hard as they can. If they manage to suck up all three seeds without sucking up an ant then the tribe would know they must be sent from the Gods.
Bob looks wearily at Frank but knowing they have no other options he puts his lips in the bowl and sucks hard. He immediately gets a mouth full of ants and screams in pain as they bite away at the inside of his mouth. Frank now even more nervous takes his turn and to his dismay also receives a nasty mouthful of the viscous buggers.
The warriors leap to their feet and surround the friends, “Now you must die” declares the chieftain. Just as the first spear is raised to Franks throat he screams “Tria-Gan!” The warriors stop dead in their tracks. “What did you say” asked the chief. “Tria-Gan” yelled frank again. Immediately the chief and his warriors turned and fled into the forest.
“Holy shit” said Bob “What did you just say and how did you know it would work?”
“Well” said Frank, “my Mother always told me if at first you don’t suck seeds try Tria-Gan.”