When Jane spins the van around at the end of the chase and takes out both the following cars with a couple of shots. From the driver's seat.
John in the other elevator
On several accounts: Jane nailing the annoying little bastard "The Tank" with a phone, John and Jane fighting each other at the restaurant and at home, and the final scene where John and Jane take out all the assassins back to back. That's a level of marriage that is too awesome for words.
During the car chase, a mook leaps from his vehicle into the back of the van. John grabs the mook and uses his momentum to push him out the opposite door.