That could apply to a couple of important things in life...
Well you know, I'm just guessing, but I am trying to make it an "informed guess".
As I've suggested before, the straight up power of a successful build may be all I can handle. Chances are that I will get everything worked out, and while never losing focus or respect for what that kind of power and speed can do, I may find myself wanting to expand the number of cars I can compete with, or just have a "little something extra" for that occasional call out that I really want to win.
The point is, I envision using nitrous as an "oh ****" button, where I've taken on a race and in the last 1/3rd of the 1320 I see headlights approaching faster than I'd like, or I've seen taillights the first half of the track, but "if I only had another 150 horsepower" I could pass this guy. Maybe lose the first race out of 3, and offer double or nothing, or see that a few seconds "on the spray" means winning the next 2 races.
That translates into
a generally limited amount of time I'd be on the button, and if 150 HP shot is within the safe zone, taking into account all of the other safety measures I've discussed being in place, well then that's the limit, and if that doesn't get it done, then I either get an offset in negotiations (the hit, X # of car lengths, etc etc) or I move on to choosing another competitor.