Grain bin entrapment occurs when a person becomes stuck in a grain storage bin, often due to the shifting grain. When grain is disturbed, it can flow like quicksand, making it difficult for someone to escape. This situation can happen during tasks like cleaning or maintaining the bin. Entrapment can lead to serious injuries or fatalities, as the weight of the grain can suffocate or crush a person. Safety measures, such as using proper equipment and following guidelines, are essential to prevent these dangerous incidents in agricultural settings involving grain bins and farm workers.