Jeff: Those two yellow zinnias at the end, they're shorter now. Now since when do flowers grow shorter over the course of two weeks? Something's buried there.
Lisa: Mrs. Thorwald!
Stella: You haven't spent much time around cemeteries, have you? Mr. Thorwald could hardly bury his wife in plot of ground about one foot square. Unless he put her in standing on end, in which case he wouldn't need the knives and saw.