For April fool's day Turbine added a new chicken play quest. In this quest you actually have to run across the moors (the PvP zone of LoTRO) as a chicken to get a new title. As you can imagine, chickens don't hold up well when attacked by level 60 creeps. This led to fun side games emerging on some servers, where freeps took it upon them selves to defend the chickens from creeps. All in all a brilliant April fool's event from Turbine.
Unfortunately, the quest proved so popular that the last "gag" for the day wasn't too funny. The servers crashed and were offline for something like 12 hours. There was much wailing and gnashing of teeth on the forums.
I was a bit disappointed that I didn't get to try out the new quest when I got home from work. However, in the grand scheme of things I don't think it's that big of a deal. Hell, there are some MMOs that get taken down for half a day every week just for maintenance. I suspect that the main reason the unexpected downtime was so apocalyptic to some players is that LoTRO has such a good track record with stability so far. We've gotten spoiled.