My knowledge of Special Relativity is mathematically rudimentary, but good enough for Government Work as they say, my knowledge of General Relativity is mathematically non existent, but I guess that for anyone familiar with GR math, such a calculation could be done during a short commuter bus ride home or even during a TV ad break.<cough> "someone" had a really* slow day...or was given this to calculate as a form of punishment.
I as for RBs, best be safe by ensuring that players RBs are kept on their respective sides of the table less the gravity wave caused by their merger disturb some of the gravity wave experiments that are ongoing.