Authorities say a freak accident at a farm show has critically injured an 8-year-old boy who was watching a farm-equipment demonstration.

It happened as a vendor displayed a cow hoof trimming machine yesterday at the Empire Farm Days event in Seneca Falls. According to the Seneca County Sheriff's Office , the 8-year-old had gotten under the machine, and it was accidentally lowered onto him. 

The boy is in critical condition with head injuries.Empire Farm Days ended yesterday. It's billed as the Northeast's largest agricultural trade show, drawing more than 65,000 people over its three days.