Just relax and go with it JOTS, relax being the important word here. It's probably best not to look back either as you'll probably tense up a little if you see something resembling a baby elephants trunk bouncing around behind you.
Don't look on the negatives and think of the positives from the experience, small things like never winceing in pain from a large turd ever again, squatt and an instant drop will be your new toileting routine. Having to gently squeeze one out in some pain this morning I'm slightly envious