Princess Leia sees the Millennium Falcon and says, "You came in that thing? You're braver than I thought." Dave says, about the dark staircase, to Kate and Jack, "You guys came through this? You're braver than I thought."
The character Kate echoes character Ray Stantz, saying, "Where do the stairs go?" and character Jack reverses character Peter Venkman's response, which was "Up," by saying "down."