i had a nice nitrous backfire, i was actually gettin ready to run sam and hua got it on tape. big fire ball, it was crazy. It blew apart my air intake and killed my MAF. Yea i got itchy and sprayed a few hundred rpms below where i should have. I don't like the window switches, because it's another thing that can fail. Allow we aren't perfect either as humans. I shifted on spray also and I guess i'm lucky I never missed a shift.
But what greg said is correct, fuel puddles up in the intake when there isn't enough velocity to pull it all the way through.