I was flying to Sri Lanka in January-normal flight normal pre landing checks- for whatever reason once we were down on all three landing gears the plane (A330-300) decelerated incredibly rapidly -most radically in 40 years of intense pax travel and a real shock and reminder about why seat belts were there-anyone standing in the aisle would have been flung forward with frightening force . A lot of passengers commented on it as we were disembarking and I am sure there was a good reason for it but the most common sentiment was my god I will never forget to fasten and check seat belt again or flip it open when the wheels touch.
I also thought it a graphic demonstration of how much braking effort is built into a modern airliner very impressive after the shock had worn off , and believe me it was a shock .