The last time we spoke I was tactfully pointing out your mistake during a project meeting at our previous employer.  Your response was to dash out the door in tears, highlighting your professionalism and inspiring a round of raised eyebrows for those of us left in the room.   At the bus stop this morning, I did in fact see you.  I just chose not to acknowledge it.  Besides, what was your name again? 

Some bridges are okay to burn.