One Two Boom is a Tier 4 Action Skill Upgrade in Gaige's Little Big Trouble skill tree. With it, Deathtrap can fire an explosive orb of electricity to massively shock nearby enemies.

Effects

Deathtrap's orbs of energy move slowly through the air and pass through enemies. If hit by a character, the orb will explode and deals shock damage in a large area.

Notes

• This skill has a cooldown of 42 seconds.

Trivia

• This skill is a reference to the Unreal Tournament series' shock combo mechanic, where shooting a ball of energy from the shock rifle's alternate fire with its main fire beam would cause the ball to explode and deal damage to enemies around it. The talent tooltip's flavor text, "100% more Multi-Kill," further reinforces this, as the line is part of a hierarchy of killstreak names spoken in Unreal Tournament.
• Taking this skill adds spikes of various sizes to Deathtrap's right shoulder.

Gaige skills

Deathtrap
Best Friends Forever	Little Big Trouble	Ordered Chaos
20% Cooler • Buck Up • The Better Half • Close Enough • Cooking Up Trouble • Explosive Clap • Fancy Mathematics • Made of Sterner Stuff • Potent as a Pony • Sharing is Caring • Unstoppable Force • Upshot Robot	Electrical Burn • Evil Enchantress • Interspersed Outburst • Make it Sparkle • More Pep • Myelin • One Two Boom • Shock and "AAAGGGGHHH!" • Shock Storm • The Stare • Strength of Five Gorillas • Wires Don't Talk	Anarchy • Annoyed Android • Blood Soaked Shields • Death From Above • Discord • Preshrunk Cyberpunk • Rational Anarchist • Robot Rampage • Smaller, Lighter, Faster • The Nth Degree • Typecast Iconoclast • With Claws