When Neo is first shown about the Matrix, the real world, and how all humans are enslaved by the machines to harness their energy, Neo has a profound panic attack. While watching this, Cypher says "He's gonna pop!"
What does Cypher mean by that? Does he mean that someone can die from the mental shock of learning about the Matrix? Does he mean that Neo could experience a physical "pop" in his body, like a blood vessel bursting, and it could kill him?