I like "I see dead people."
Let me set the setting for the next one:
Rose just jumped from the lifeboat and back into the Titanic. Jack is panicking, and runs to find her. Rose runs to find him, and they meet in the middle.
Jack: "You're so stupid!" -kisses Rose- "Why'd you do that!" -kisses rose- "You're so stupid!" -kisses rose- "Why'd you do that!" -kisses rose-
Rose: -kisses Jack- "You jump I jump right?"
-Titanic, 1997
I love that part! Watched it on youtube.