Politeness

It happened to me many a time to be defeated in great style by my opponent. I know Kasparov used to tell chess is the most violent among games, but what I'm not still able to understand is why, after winning a good game, you should abuse me and say offensive things about my poor abilities. I find it to be so little sportmanlike

:( Agree.

I always say "good game" when I get my butt handed to me. Which is pretty much every game since I just started learning how to play. >_<

But I hear from skilled chess players that it happens a lot. Sorry to hear that. People and their fragile delusional egos.

Note when flipping the table it's best to keep your back straight and bend at the knees.  Staying healthy and injury-free will enable you to flip tables for many years to come.