Originally posted by Isis:
I was meditating and my right leg started to ach. I had then
focused on the unpleasant feeling.The funny thing is that the pain
went away and disappeared as if it is not there in the first
place.
Your focusing and willingness to face the unpleasant feeling
eliminate unncessary resistance and that helps your brain and body
to adjust more readily to the unpleasantness. The pain is no more
there not because of your focusing, it will subside even if you did
not focus on it; it subsides naturally when the body adapts to
it.
Secondly, my breathe become shorter and faster as the meditation
coming to an end. I thought i couldn't control my breathing but I
was still rather awared of the surrounding.
Think it is due to expecation that the meditation is coming to
an end. You await the meditation to end subconsciously... 
