This is another interesting tale that could be used as the inspiration for Delta Green, the 'event' took place in 1980 and appeared in several UFO related books in the same decade, but because the claimant left the investigation without giving their contact details the case fell into obscurity, or perhaps there was another reason.
Late in the evening of November 19, 1980, a man and woman were driving home to Longmont, Colorado, and had a strange experience. An intense beam of blue light locked onto their car. A noise as loud as a jet engine at takeoff but similar to the whish-whish of a bull whip accompanied the light. The radio filled with static and faded out. The headlights on the car dimmed. The rear wheels of the station-wagon left the pavement as the car lifted up at an angle. Then, abruptly, sound and light ceased and they were rolling along at 50 m.p.h. Checking their watches they discovered over an hour had vanished from their lives. Though, technically, they had not actually seen a UFO, nobody could doubt one was present. The resemblance to Neary's railroad crossing encounter in Spielberg's blockbuster Close Encounters of the Third Kind leaps out at you.
"If you do good, you'll live forever, if you do bad you'll die hearing a single note for I am the one true sound...", Fragment found in a cult hideout.