Fog

On a Jet2.com from Dusseldorf to Leeds - Plane very full 142 passengers - totally uneventful flight until 3km from leeds, I realised it was very foggy. Big thump as the plane hit the runway, but landing was ok otherwise but very foggy. Whilst taxiing Captain comes overs the intercom - "Due to the visibility being 250m, a computer has just landed this aircraft, in afew years you wont need pilots!"
Passenger reaction was interesting over the next 5 mins: reaction ranged from "Never flying again, wouldn't have flown with these people if I knew they used computers" - to one great comment - "hope they weren't using Windows Vista !"