I know, just filling people in who may not know what it's all about.

I was at a birth this weekend - mum had a normal birth until...

Midwife: "I'm just giving you an injection..." (moves towards thigh with injection)
Woman: "Huh? What's that for..." (too late)
Midwife: (nothing)
Me: "That's so they can hurry up the birth of the placenta"
Midwife: "It's to prevent bleeding"

Nothing wrong with a bit of extra information.