He just loves to get stuck talking to bores describing every flight that they've ever been on and where the pilot went wrong taking off, in the cruise and landing.
I've been trying to work this one out as well. I think it is possible they are landing the planes rather hard but I haven't been flying them often enough in recent times to comment definitively. The times I have taken them I have certainly noticed the landing and it has seemed like the pilot has it in for the runway and wants to smack it hard.
The trouble I have is I wonder if I am expecting the jolt and am tensing up on landing without realising thus exacerbating the effect. I don't think I am though as I am a very experienced flyer and never nervous but I can't discount the possibility that I expect it. Think I will have to invest in some accelerometers and see if I can measure the jolt objectively