I have heard this rumor for a long time that Johnny Cage could uppercut two heads off his opponent in the first MK. I didn't believe it was true, until I played my MK1 that came with MKD. I did what many had said was how to do it, and he finally did it! Johnny Cage uppercuted two times, and two heads popped off. All you have to do is do his Fatality, and before he does the uppercut decap you do the same thing over again. So it is: F, F, F, HP, and then F, F, F, HP. Good luck at doing it, because it is difficult to do, and I've only done it twice.