I don't know whether it's Fitzquake, Quoth or the map, but I was playing through this map today (somehow I missed it back in '08) and turned around to find myself watched over by
this giant and his less interested friend! For some reason, when I quickloaded after drinking some lava one wall of the skybox got replaced by Quake guy's skin! The next time I quickloaded he'd wandered off, presumably to watch someone who dies less.
Is this a well known bug? I've never encountered it before, as far as I recall.