All That Was Missing Was Popcorn
When stranger drama unfolds before your very eyes, you have no choice but to call your boss and tell them that you’ll be late. Don’t worry about getting a pay cut or whatever, they’ll totally understand if you give them the juicy details. This guy just happened to be in listening distance of some guy’s drama, which was happening over the phone.
Right as the OP was silently siding with the strange man, in comes a strange woman who shouts loudly enough for the entire bus to hear. Apparently, according to the man, it was her fault that he was unfaithful. Nice gaslighting attempt.