If you are running heaps of COBs (and/or heaps of creatures) in your Albia, occasionally you will experience the bug known as the Egg in the sky. Basically, a small egg-shaped object appears in the sky far above the Statue of Nornity. This is not so annoying in itself, but all norns have an abiding fascination with it, and will attempt to walk towards it forever - sadly to the detriment of their health. ("Eggism", as coined in a question to Ask Laura)