Tim: Now, working on a furnace is a delicate operation. Almost like working on a time bomb.
Brad: Wow, that's how he's gonna die. He's gonna blow himself up.
Tim: That's not how I'm gonna die because your dad is gonna practice furnace safety tips. Okay, the access panel here says, "Press button, hold 15 seconds, and..."
Randy: [to Brad] Open your mouth, or the shock waves from the blast will make your head explode.