Falls.Falls on the same level (tripping or slipping and falling) and falls to a lower level (from ladders, scaffolding and roofs, for example) repeatedly rank in the Top 5 on the Liberty Mutual Workplace Safety Index. A worker who falls may suffer anything from a fracture to a traumatic brain injury (TBI) to death from internal organ injuries. Construction workers who fall at work sites are at risk of being impaled by parts of the structure, construction materials, machinery or equipment. Direct costs of fall accidents across all industries top $10 billion a year, Liberty Mutual says.