Jag tror att historien du refererar till är "Eye for Eye" av Orson Scott Card. Från Wikipedia:
Mick Winger has an unusual gift and with it has accidentally killed several people. When Mick gets angry at people, his power manifests itself by launching an attack upon them by giving them cancer, leukemia or related terminal illnesses. If made angry enough, his anger can outright kill the victim.
Det fanns en scen tidigt i berättelsen där Mick, trots hans bästa ansträngningar, slutar sätta en busschaufför med sin kraft. Utdrag:
Some other people said, "Hey!" kind of mad, and I realize now that they was saying it to the driver, cause they was on my side. But at the time I thought they was mad at me, and that plus the scare of nearly falling and how mad I already was, well, I lost control of myself. I could just feel it in me, like sparklers in my blood veins, spinning around my whole body and then throwing off this pulse that went and hit that bus driver. He was behind me, so I didn't see it with my eyes. But I could feel that sparkiness connect up with him, and twist him around inside, and then finally it came loose from me, I didn't feel it no more. I wasn't mad no more. But I knew I'd done him already.