On the afternoon of November 6, 2023, Francisco Lumbreras, 52, was working for a site preparation contractor in the Bronx applying grease with a grease gun to a fitting located in the back of a ready-mix delivery truck. He took a step or two back, according to federal safety records, when his clothes were caught by the rotating shaft that drives the vibration air valves. He tried to free himself from the spinning shaft, and a coworker heard him shout and turned off the power. But by then Lumbreras had been pulled in, cutting and crushing his upper body, killing him.