Seriously, and I mean this from the bottom of my heart, if he would've said that to me in person, I would've slapped him... backhanded, like "bitch, shut up" style. Zex kits suck ass, get NX or N.O.S. I understand that you're concerned about safety, but if you aren't smart enough to not push the button when you don't want to spray, then you shouldn't have nitrous in your car anyway. Furthermore, you can put a WOT switch (which will make it only spray when the accelerator is to the floor) on an NOS or NX kit as well.