After half midnight I realised I'd better get myself to bed as we were off the ferry the next day at 6.30, although as it turned out they woke us all up with a tannoy announcement at 5.30 in the morning with threats of rapid breakfasts and swift exits. Even despite this I managed to be the last person off the ferry (oops).
On the way back I took the fast ferry which does the crossing from Belfast to Cairnryan in about two hours. I found a great place to sit outside on the upper deck (still couldn't see the horizon though) and wondered why we were 15 minutes late for departure. It was only when I stood up that I realised we were moving - it was almost imperceptible.
Other posts in this series
WholeLottaSoleapalooza #1 - Epic journey to and from Belfast Film Festival (this post)