Similar thing for me last weekend when I laid Werder Breman against bottom of the table Karlsruher. With the Wafer Cup final this week, there was no way I could see Breman getting stuck into a match with nothing to play for.
I got under evens, so it wasn't a huge risk, but I was thinking "what have you done?" just before kick off. Luckily they lost 3-1.
Man U are a different beast though. I could easily see their reserve team winning against Hull, but I still wouldn't lay Hull at that price.