He probably just hit fourth plateau and wasn't able to type (like I'd expected). Typing gets near impossible when you reach third, and considering a fourth is twice that amount, yeah. No way.

I highly doubt he died, but he could still be tripping. I'll bet he comes back feeling like he tripped for a week.

And he wasn't trying to be "cool". There are some very eloquent, intelligent, and articulate psychonauts who explore their mind with the use of hallucinogens. DXM is particularly underrated; it is capable of much more than judgmental people - without the interest or motivation to seek the research to enable them to know what they're talking about - know of.