What are all these giant version of monsters randomly spawning?

There is always a flaw with such systems. If this is what I think it is, then this is similar to the Maple Leaf falling event, where you jump around to get maple leaves and especially the gold ones (the similar minigame for korean rice cakes etc. goes by the same system, except you are in a floating map). The flaw is in latency. I can stand at one spot and have 5 leaves drop on me at one go, and I only register the first one. Teleport and flash jump affects this too.

It must be server-sided because client-sided programming makes it too prone to hacking... well... I think the corpse of the horse can't neigh at us for flogging at it again.

Hadriel