"It's like passing a bowling ball"...but like how?

I know this is one of those things you have to experience to really explain...but like how does it feel? I hear the head comes out first? Do you feel the arms and the legs come out too?

Why don't they teach this stuff in sex ed? All they did was show a woman giving birth and the baby popping out and it scared the crap out of me. Still does, it's like watching Red Asphalt. Those images stay in my mind forever. =[