These workers are using a special tool to install carpets, pushing them forward with their knees. The process is painful, but it's necessary to get the job done right. Traditional methods often leave carpets loose and wrinkled, but this tool, called a knee kicker, helps stretch the carpet tightly. Workers grip the tool firmly and strike it with their knees, pulling the carpet evenly to the edges for a smooth finish. Even though the tool has padding to soften the blow, it's still tough on the kne