It's definitely not enough warning. Even knowing what Daniel is doing, the force of the explosion seems to rip through Seth. Not literally, because they're far enough away that he's not even knocked off his feet, despite how unsteady he feels at moment.

He doesn't look back. He wonders how many people just died because Daniel pressed that button. Surely the people who by now might've been making their way up the hatch. Probably more nearby. Dozens, maybe. Perhaps even more. Seth can't gauge the logistics of it.

Images make their way unbidden into his mind, now there's nothing but walking to focus on. The closest ones would've been blown to bits, dead in an instant. The ones further away won't have been so lucky. They'll still be alive, but not for long. Body parts blown off, letting them bleed to death. Or getting trapped under debris from the cave-ins undoubtedly caused by the explosion, crushed to death, or perhaps slow suffocation.

He wonders what they're thinking. What they're fighting for. Whether they know who's killed them. What their names are. He wonders if Daniel knows.

Without warning, he drops forward onto all four, and empties the contents of his stomach onto the ground.