Weird news - Helicopter blade accident kills man

We use a lot of machinery as a part of our daily life, and this is normally fine. However, human life is fragile (in the sense that the body is fragile) and malfunction of a lot of the machinery can threaten this human life. From time to time, we hear of incidents such as a boiler accident or factory explosion or chemical accidents where people or more than one person gets killed. This is another such case where an accident claimed the life of a person, the accident being just a freak accident.
There was maintenance happening of a helicopter, when the helicopter was started and the machinery moved up and down with one of the helicopter blades striking the man, causing his death. Now, maintenance of such aviation assets such as helicopters and planes is a routine work, happening for decades now and with a checklist of activities that need to happen one after the other. For a person to die during such an operation means that something went seriously wrong (link to article):

A maintenance man was decapitated by the rotor of a helicopter at the Brooksville-Tampa Bay Regional Airport in Brooksville, Florida, a Hernando County Fire Rescue official told CBS Tampa affiliate WTSP-TV. The Federal Aviation Administration said the blade struck Salvatore Disi, 62, of Hudson, Florida, who was doing maintenance work on the aircraft Thursday afternoon. According to the Hernando County Sheriff's Office, a caller said he and another person were using a power cart to jump-start the copter when it jerked up and came down quickly. That's when Disi was struck by one of the main rotor blades. He died instantly. Deputies said no foul play was suspected.