From personal experience, I gotta say it doesn't exist. Who knows though, maybe it is.

I'm not hundred percent sure on my own belief of this, I do believe that if something negative happens and someone laughs and then moments later something similar or bad happens to them, but I'm not sure in good bad karma as a general , it's an interesting topic

I Dont Believe in Karma Their are millions of children dying of starvation and thirst but what did they do to deserve no food or water please explain what horrible thing to deserve no food or water

Personally, I don't believe in Karma. If people are rude and selfish, eventually it will come around and bite them in the a*s, but that isn't karma, it's because they created a situation for themselves.. for example everyone at work hates the cocky guy, he is eventually fired.

We all have a choice in what we do, if you want to believe karma then i'm all for it. People who believe in it seem to be better people - but worry too much when they've done something wrong.

Only with things that are directly related. In other words... If I spare a hobo some change maybe he'll do something kind for me in the future. But If I spare a hobo some change and I win the lottery I don't think one had to do with the other.

Just be nice to be nice. not for Karma

I am a firm beleiver in karma because ive had a few times where ive done something less than decent to somebody and a short while later something crappy find its way to me

I don't believe in karma from personal experience, I've done plenty of good things to have it bite me in the butt later on.

Plus Yin makes a very valid point which I completely agree with.