"Right, then. They basically track down stuff that causes problems. Preferably before it ruins the world's day. Kinda like hunters, but they go after objects instead. Some of 'em are harmless enough like Marilyn Monroe's hairbrush making whoever uses it platinum blonde for awhile, but there's nastier stuff they've got buttoned up. Like the movie prop from Raiders of the Lost Ark started acting like the real thing." He's just gonna shut up for a moment to give Castiel time to absorb that.