Although I do remember thinking, 'is that it?'
This is how I felt about Buster's labour - was just under 2 and a half hours, and thought the exact same thing when it was time to push.

My first was 22 hours and I was hoping for half that for my second! But it was 2 hours and 24 minutes to be exact and was fantastic

I don't know if it was just my experience or if this is usual for faster labours...but I felt that the contractions were sooo intense much sooner the second time. That was the most challenging - not having time to ease into it.