Hmmm, well if he was 'kind sideways' it might have mean his head was presenting in a funny way. When a baby's head is not putting pressure evenly on the cervix, it can mean that the head presents uneven if that makes sense. He could have started coming down before he'd turned properly round so the 'smallest part' of head was not presenting - the wider range was! And if he had a slightly bigger head then that may have made it a little harder. Sounds like a bit more time would have done you good, but you really never know until you're there and you can see and feel what's going on.
About the farting thing, I know it's 'embarrassing' because it's your bum but midwives hear them all the time!! In fact, it's often poo as well. It's just part of having a baby. If you can leave those issues at the door this time, it will certainly help you. If it happens this time, just go on pushing like it didn't even happen! I once had a lady fart right near my face and she was really embarrassed; I honestly didn't care because she was doing some FAB pushing and her baby was born not long after - I just said "Good girl, that's the way!!" like I didn't even hear a thing.
GO VBAC!!
How is everyone else? Come to think of it, WHERE is everyone else??!