Satanshost; From Winkipedia:Karma (Sanskrit: k?rma (help?info), k?rman- "act, action, performance"  ; Pali: kamma) is the concept of "action" or "deed" in Indian religions understood as that which causes the entire cycle of cause and effect (i.e., the cycle called sasra) originating in ancient India and treated in Hindu, Jain, Sikh and Buddhist philosophies.
The philosophical explanation of karma can differ slightly between traditions, but the general concept is basically the same. Through the law of karma, the effects of all deeds actively create past, present, and future experiences, thus making one responsible for one's own life, and the pain and joy it brings to him/her and others. The results or 'fruits' of actions are called karma-phala. In religions that incorporate reincarnation, karma extends through one's present life and all past and future lives as well.
And the "Guy" you were refering to is Buddha.