Coming in to Liverpool on an easyjet flight just before Christmas a couple of years ago. Lovely cold day, excellent visibility. The approach seemed normal but no flare, just 'BANG' and we're down. A couple of ceiling panels came loose and a few overhead lockers sprang open (fortunately nothing too heavy came out). As we were taxiing in the captain came on the PA, still chuckling, and said the FO (PF) 'swore that the runway was six feet lower when we left'.
On the return flight to Geneva it was quite stormy over the lake and on the final approach the aircraft surged up and dropped twice, with a bit of a roll thrown in to make sure everyone was properly disorientated. This was followed by quite a strong acceleration on to the runway. As we taxied in the captain said 'Well, ladies and gentlemen, I hope you all enjoyed that as much as we did'.