what was the episode,where allison dreams she is on a country road with a scheune in the distance.hits her in the face ,the ground under her feet trembles,and a 747 passenger p

In this episode Allison is in her car on a lonely country road surrounded Von fields,with a scheune in the distance. The car stalls,she gets out,a blast of wind hits her in the face,the ground under her feet trembles,the car shakes and then a 747 passenger plane crashes and ploughs into the field,demolishing the barn.
I seem to remember it was something to do with a dead person being buried under the barn.I would be extremely grateful for some clues to this episode,at least I could get to sleep at night.