As I understand local reports, Reeves and his wife were seated in the last row of the auditorium. Their son was expected to join them at the theater. The son was running late to meet them.
Conjecture: Perhaps they had told the son they would be in the last row? Perhaps they chose the last row to avoid disturbing other patrons because their son would be arriving late?
So? Move over a few seats. One of you stand near the door. There are options.