Trivia: When Ben Peterson is killed by a giant ant, he emits a high-pitched, half-choked death scream. This scream has been used in many other movies ever since: in Small Soldiers (when Brick Bazooka loses his legs); in Star Wars - A New Hope, when Luke shoots a stormtrooper in the shaft-swinging scene; in Lord Of The Rings - The Two Towers, when an Elf warrior is thrown off the Helm's Deep wall; and in Lord Of The Rings - Return of The King, when a Gondor soldier fleeing from Osgilliath is snatched up and dumped by a Nazgul steed. I guess that makes it the most used death scream in movie history.
Trivia: Leonard Nimoy has a uncredited appearance as an army sergeant at the hospital.
Answer: You fill the canvas bag with water, put it somewhere where the air can blow through, and the evaporation of the water seeping through the canvas creates cool water inside.
stiiggy