I'll take it from here
Means you're taking over because the other person is a complete mess and probably deserves to be kicked out of the room.
I'll take it from here," he said, as if I'd just spilled coffee on his resume.
"I'll take it from here," she whispered, like I'd just insulted her mother.
He said, "I'll take it from here," right after I dropped a plate on the floor and screamed.