User blog comment:Pacifista15/Explosive Punches/@comment-4830969-20120217183427

< Finds an old post....en just revives it! HELL YEAH! My scientific theory is that he increases blood pressure and flow so much that the temperature of his hand reaches high levels (P1*T1=P2*T2 "Just Physics") and causes burning. In addition the hardening armament (which possibly is vulcatization) transforms arm in silicone-like rubber which is able to withstand fire and extreme temperatures.