This may be a stupid question and if so, sorry. Why in the world wouldn't the bathrooms function? I've been on flights that lasted at least that long and there wasn't a problem. I too have been stuck on the Tarmac for several hours because of thunderstorms. I don't recall there being a problem getting up to the bathroom, but maybe I'm mistaken. It has been a while. Bit of a head scratcher for me.

LW