" Indy guessed that the obelisk was "the key" - removing its headstones caused sand to flow out of it, triggering the temple""s chamber entrance to open.Having chosen a misguided film director as the main character of his own film, many critics have generally assumed that he film had a personal, introspective, autobiographical slant, with Sturges arguing for and affirming the production of light comedies (to lift viewers"" spirits) while providing commentary upon serious ""message"" films.Gus: You know, sometimes I can""t tell s--t from shinola, Doc.What was all that you just said?Beth: She intended the book to be her alibi.Dr.Lamott: Correct.Beth: She""s going to say: Do you think I""d be dumb enough to kill anyone in the exact way I described in my book? I wouldn""t do that because then I""d know I""d be the suspect.They know you""re gonna be miles away before you find out you got f--ked, OK.They know you""re not gonna turn around and go back." The next day, Riggs discovered his partner Murtaugh imprisoned on his upstairs booby-trapped toilet rigged with an explosive device - triggered to be detonated when he stood up (the TP roll warned: "Boom, You""re Dead!").