After a few days of absolute agony and barely being able to move at all... the one thing I did notice upon leaping out of bed at 4am was that it was suddenly easier to move... very easy to move, and no pain. I'm sure it's related to the bubs moving down, as it didn't happen to me until my waters broke...

As for the spasm-type movements - they start to make a whole lot more sense when your baby is born and you see the type of movements they make.