Aveley Abduction (1974)
This is a famous case within the annals of UFO history, but it must be stressed that the abduction scenario only emerged after hypnotic regression, which at best is highly unreliable.
On 27th October 1974 John and Alain Avis (pseudonyms) were driving home to Aveley with their three children, when they ran into a green fog. They drove straight through it and their radio started to crackle and smoke, but they emerged from it further down the road.
They suffered a period of missing time, and after strange dreams they were hypnotically regressed, which revealed a classic abduction scenario, involving aliens from another planet.