Yes I have been to the Reno Air Races. I have done many rejoins without benefit of advanced avionics. All the rejoins you have witnessed have been with a cooperative aircraft in a steady turn allowing the other aircraft to use geometry to affect closure. You cut across the inside of a circle using more bank than the aircraft you are rejoining on. With the straight ahead rejoin the overtake is achieved by significantly reducing power and giving the other aircraft an advantage.

Is it possible for a 777 to rejoin on an unaware 777 at night, at altitude, sure. Did it happen in this case no. It is much more likely the USS Enterprise traveled back in time and accidentally destroyed the triple with its tractor beam. Don't worry they were all beamed safely onboard and will be returned when Spock discovers that one of the passengers descendants is instrumental in developing warp drive or saves the whales I forget which.