I think everyone reacts differently to pain & of course has different a pain threshold.
I'm stupidly polite & quite a quiet person, BUT when in labour, & with that gas & air I'm not ashamed to admit I screamed and shouted & swore! I feel that it was (IMO) out of my control, and is the reason why I don't like the gas - it makes me loose control. But again everyone is different.
I will add that at the point when I screamed & shouted, I was in fully established labour - so perhaps at 2-3cm dialated the girl was over reacting, but we do not know this. Maybe she had a very low pain threshold or perhaps she was just very scared, which made her body tense up & the pain then would have become worse.
Yes she shouldn't have called her baby that name, but I'm sure she didn't mean it & will probably always remember & feel awful about it.
Labour can be a scary thing & if your not prepared for that pain, you then may become scared & you will make the pain worse for yourself. (which is what happened to me)
The best thing I can recommend is that you read up on positions, exercises, maybe attend antenatal classes (never done the classes myself so can't comment on how helpful they are) etc to help you when the time comes. And when the time comes try to remain mobile & do what you body tells you to do - lying on your back isn't always the best position to give birth in, so do not feel that you have to do that jut becuase that is what they always show you on TV
Hope that helps someone. Good luck to you all