Or, how about, "This is the part where you fall down and bleed to death"?
I shall (am going to - or even "gonna", in the heat of a fight) tear you apart!
I'm going to make you regret the day you were born! :twisted:
While in the middle of a fight, you can taunt your opponent:
"What's the matter? Getting tired?"
"I'm just warming up, you pathetic worm!" :twisted:
Am I supposed to be impressed?
That's the best you can do?
etc.
I hope to have come across as a real man.
;-)