It is quite disgusting how some people will go out of their way to say and do cruel and hurtful things. Says a lot about them though, doesn't it?
when you said "bye" as you were passing him, he would retort "bye now, pay later"
Wow, he sounds like an obnoxious @ss. I wonder what his reply would have been if you'd have said "toodle-loo!", or "farewell!"