Without A Paddle

Be the last dwarf standing, out of both primary and secondary ammo, right when a Dreadnought spawns. A specific pinch: everyone else down, you empty on both guns, and a Dreadnought appears. Easiest to engineer on a solo Elimination mission - burn through all your ammo just before triggering the boss, so you're empty-handed as it spawns. Then pickaxe away (or die trying). A dramatic one.