"Henry "Mutt" Williams-Jones III: What is it, quicksand? Marion Ravenwood: I'm calm. Dr. Henry "Indiana" Jones, Jr.: No, it's a drysand pit. Marion: I'm sinking, but I'm calm. "Indiana": Quicksand is a mix of sand, mud and water and depending on the viscosity it's not as dangerous as people sometimes think. Marion: For Pete's sake, Jones, we're not in school! "Indiana": Don't worry. There's nothing to worry about unless there's a… [suddenly there is a void collapse] …a void collapse."