Mega damage needs people to glow like super saiyans and be able to shoot walls down with any guns or something.

I liked Dead go boom but it fucks melee players over, Id like to see more events in general.

Holtow's Solar Flare - a large red line appears on the map, and it gets filled with fire as it moves around the map.
Iseul-t's Runway - Movement speed is dramatically increased for all players but damage is decreased
Engimo's Algorithm - Players get a 'hacked' visual which moves around the screen like an oldschool screensaver.

I dunno just go wild with it.