Ants getting stuck in paving stones

[Wyrmstar]

At the top left of the map there are a bunch of paving stones surrounding the water pond up there.  It appears a large amount of ants get stuck inside these stones.  You can hear them as you run around on the stones.  Some times they will clip halfway out and you can kill them.  There may be other insects getting stuck here as some times you can hear them fighting in there and can see blood spatter.