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, then comments how handy the double doors are.