Last one definitely. Great job. Full color is always best (sometimes) and it's easier to see the dynamite. And I agree with Acoma, play up and exploit that "explosive" or Sabotage element. A circle is a very balanced shape too, try an oval to make it a little more tense. Whattya think?
Gregger that oval does look much better, gives the malicious sabotage text a feel of being proportional to the graphic. I'll work on giving it more of an explosive feel. Again thanks for the feedback.