... (sometimes) when they reach the end of area demigods can move on and move across space only angels and spirits can fly in. After a few seconds of being frozen they appear on the other side of the gap in the map, where demigods can move.
http://rapidshare.com/files/185424490/Untitled.avi
run at 0.5 speed
Edit: Hah! This bugreport sounds like im on dope. "Tiny birds in the skies freeze..." "and move across space only angels and spirits can fly in". It makes sense though, right? ;(