Talk about a japanese curse !
I was in Japan for the last two weeks and my K-5 had a similar accident.
I had put it on a tripod with 12 sec timer in order to take a picture of my girlfriend and I from the Tokyo Tower when a kid tripped on the tripod and my camera fell on the floor with the lens pointing down.
My heart stopped for a split second, but luckily my DA-L 55-300 had its lens hood on, and the hood took the worse of the damage.
I just had to readjust the plastic lens mount which had been displaced, but the lens itself didn't suffer any damage !
And apart from a few dust stains on the mirror which I will clean when I have a proper tool, my K-5 has been working like a charm ever since that day !
How's that for a tough mo'fo' ?