More than 600 farmers have suffocated in flowing grain over the last 40 years. About 80% of documented cases involving a partially-entrapped victim, result in a fatality, according to Bill Field, Purdue University Extension farm safety specialist.

"Many grain entrapments are fatal because farmers underestimate the tremendous force of flowing grain, and how quickly they can be pulled under," Field says.

Iowa State University research indicates that 325 pounds of force are required to release an adult buried to the waist in grain. If a farmer is buried up to his head, it requires 625 pounds of force.

In less than 20 seconds, a person standing in flowing grain would be submerged to the shoulders. After 60 Seconds, a person’s head would be nearly six feet below the surface in a full bin.