I don't know about the RSX-S, but I know the CL-S 6-speed will lock you out of first gear when you are going a certain speed. It doesn't prevent 1st gear shifts, but it makes it very difficult to shift into first (a lot of resistance), so a person would know that they're accidently shifting into first. I don't know if this same kindof protection exists in 2nd gear.
The question is, if he's in third and gunning it, he needs to let off the gas and apply the clutch (well, assuming he's not an idiot, which he very well might be), then shift into 2nd ... when he shifts into 2nd, as he lets go of the clutch he should realize that its in 2nd and be able to re-apply the clutch real quick and shift back into 3rd or 4th... Its obvious that this guy doesn't have a lot of experience with driving, or he was so "into" racing or whatever he was doing (eating pizza?), that he didn't notice his engine blowing up until it was too late.