What is the experience of pushing your placenta out like? Is it painful? How long does it take?

I can't feel any pain and didn't even notice when did the gynae pull out the placenta from me. I think it was also due to I was too tired and too concentrate on my newborn baby who lied on my chest. It takes about a few minutes to deliver the placenta: http://www.childbirthconnection.org/article.asp?ck=10515