Sympathies to all involved in this horrific event and the family of Mr Buchanan.
got this from the KFOX website...
KFOX spoke with a professor of mechanical engineering at UTEP who tried to explain what may have caused the tragic accident.
"Obviously the only way that could happen is if someone revved the motor or accelerated the motor and I mean basically what you got there is a hurricane in front of that motor, you know hurricanes are 100 miles an hour. You're going to have that same amount of air flowing through that motor," said Gary Hawkins, a professor in UTEP's Mechanical Engineering Department
I thought professors were clever people.
Apparently the poor guy was trying to catch his hat which had blown off his head! I guess it's a reflex action and probably unbalanced him. It doesn't bear thinking about.