"Seriously?" Dean looks sharply over at him, disbelief on his face. "All they have to do is make this place cave in, or release some toxic gas, or just trap us down here until we starve to death."

Dean's of the opinion that if you want to kill a lot of people quick, trapping them in one confined place with limited to zero escape routes is the way to go.

"Or maybe it's the only way out of the Cape like the guy said." But Dean has his doubts.