In order to solve a case, Tony and Ziva are sent packing to the most romantic city in the world, Paris! The hotel screws up their room reservations and accidently has them share a room.
Tony is doing a William Shatner style delivery when he does this. This makes the line a reference to a classic Twilight Zone episode, Nightmare at 20,000 Feet (5x03). The episode was one of the four selected to form the basis of the 1983 Twilight Zone movie.