Was that a head, or an ass?

This morning around 3:45 am I was woken by a lot of movement happening on the left-side of my body. I placed my hands on the area and felt a totally new and different occurance, a hard and round part of the baby. The hard and round object, which I believe to be the head or butt of our baby, moved from right to left depending on where my hand was placed. It was a close encounter of the natural kind! It felt so so so weird... I can't compare this feeling to anything I've ever experienced, and it's even harder to describe. But let this be said, I definately have a baby in there.