Blacking out or claiming no memory is a common cover story in a terrorist style attack. Or accident.
London Croydon Tram Overturns Driver Arrested Nov 20, 2016 - 2016 Croydon tram derailment At least seven people have been killed The Guardian reports that some passengers said the driver had blacked out at the controls.
NJ Transit Engineer Says He Doesn't Remember Fatal Hoboken Crash gothamist.com
Oct 3, 2016 - Thomas Gallagher, the New Jersey Transit engineer operating train
www.theatlantic.com . and reported having no memory of the time leading up to the crash, though ...