Best shutdowns I've gotten: Pull up my bubble in front of a nova bombing Warlock. He pops my bubble, then I continuously punch his face in. See a Defender Titan in his bubble with two of his friends. I jump in, throw a Lighting Grenade in the middle of a bubble, and jump right out. Everyone runs out of the people and I shotgun/melee them to death, later got killed by a self-rez'ed Warlock.