Special attack for Double Cannon?

[Adduk]

What is the Special Ability that the Double Cannon has?

[Elusive_Llama]

Shoots out waves of energy in all 4 cardinal directions, and drains your HP per blast. Kind of worthless because it misses too much and doesn't do alot of damage. Probably best for opening boxes, dropping your hp so you can use the Dark Flow special, and impressing newbs.

[Celes152]

HUcast and HUcaseal can use it to disarm traps too.