Mega server
If we were on the overflow system you could have just as easily been put in an overflow. The megaserver didnt specifically make you DC. Your internet connection or some other game problem likely caused the DC.
The Megaserver system has its share of problems but it is not all of a sudden making people DC. Its beginning to grate on me that players are using Megaservers to blame as the cause of all their problems in the game.
I usually find that I have a much higher chance of DCing in large world events if I am pushing the game at max settings. Try lowering your gfx options in the UI. Specifically target ‘Character Model Limit’ and ‘Shadows’ as your starting points to reduce chance of DC in large scale world events.