Ego, My Lego

Alright listen up, buttercup. This joke is playing on the words "Ego" and "Lego." El/11 from "Stranger Things" is saying "Ego, My Lego," which sounds like "Ego, My Ego." It's funny because it implies that El/11 is full of herself. And you probably think that the mitochondria is the powerhouse of the cell.