I'm completely baffled as to why so many people even think of using EMP when going for the 'Hold your Fire' trophy... like Paul said (in another thread, I think), you're actually making things harder if you use EMP, since the familiar layout of the mines from the first and second laps will be gone, and at higher speeds you'll have less time to react to a new one that suddenly popped up behind a corner. This trophy is by FAR easier if you leave the old mines be, trust me on this. If you're having trouble keeping a steady racing line navigating past a certain mine repeatedly from lap to lap, purposefully run into it and hope that the new one spawning won't be in an even worse position (it probably won't).