Fallin', yes I am fallin'

All I can get is those two lines of the Beatles' song, anyone know which it is? And votes on whether it's 'fallen' or 'falling'?

I fell.

One of the scariest moments of my life. I was doing my regular morning run, and was running down the last hill to my apartment. Because it was the last hill I sped up to the finish, and also because I was finally going downhill (it's uphill the whole run until that bit, I swear). And then the sidewalk jumped up and grabbed me. I just laid there for a minute, with my heart pounding so hard that I couldn't even hear my iPod anymore. "Am I ok? I can't be ok, because I really hurt bad!" But I couldn't see blood, so I decided I must be ok and tried to stand up.

I was having a hard time standing upright, my heart was really not quieting down at all, and I was a little shaky. A woman stopped her car in the middle of the road to ask if I was ok, and I was just like yeah, I think so, but I really need a minute. She was really concerned and actually stayed there for a little while.

I walked home, fortunately it wasn't too much farther, and found that I had taken all the skin off one knee, and most of the skin off the palms of my hands. And today all kinds of places hurt.

Old people should not fall. We're just not equipped for it.