10 Wrestlers Who Got PISSED When Their Moves Were Stolen
4. John Cena's Burning Hammer*

*John Cena's AA.
John Cena never added Kenta Kobashi's Burning Hammer to his in-ring arsenal. He used something very different for his finish: the FU/Attitude Adjustment. A humble fireman's carry, ostensibly, executed with his legs jutted out rather awkwardly, he used it as an in-character response to Brock Lesnar's F5. It's weird that it became his signature finish long after that short feud ended, but maybe not. It looked feeble and not remotely aesthetically pleasing, but it was over. There's no disputing that.
Tyler Reks did use the Burning Hammer, at least by name. Before somebody took a blind bit of notice of a WWE C-show, Reks modified it to align with WWE's in-house standard; the set-up was identical, but he didn't or couldn't take the same risk as the master did. The impact saw his opponents take a far safer bump more redolent of a facebuster.
That somebody was John Cena, whom Reks alleged pulled him to one side at a house show and instructed him never to use it again lest he be fired. The response was fairly ironic, even hypocritical, given the origins of the AA itself. It's not as if Cena was a major star at the time.
Still, a bit close was considered too close, and Cena had the sway.
Sympathy factor: Little, since Cena wasn't some appalled tape trader.