When James Whitmore is attacked by the ant in the Los Angeles sewer system, James Arness arrives, firing an M-1 Garand rifle. In the next scene, he's armed with a Thompson submachine gun.
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.