For me, contractions were the worst. I don't remember the pushing bit being painful, just a massive uncontrollable urge and a huge relief compared to what had preceded it. My transtitional bit only lasted about 20 mins but it was relentless; I remember saying all the usual "I'm not doing it" stuff but when it changed, I don't remember pain at all. I don't recall any of the burning on crowning or anything.