MELTDOWN formerly BOOMER formerly BOOM BOOM aka Tabitha Smith is a energy/plasma/thermite timed bomb discharger.
as BOOM BOOM / BOOMER by way of a battle cry like, "en guarde!" or "have at thee!" Meltdown would cry 3. "heres lookin' at you sweetcheeks"2. "nothing personal, Cable calls the kills" 1. Sayonara.
then kaboom, stuff explodes, melts, burns and so on