[001sky]

There are some odd comments on his blog. See, eg:

I know this is a rough time, but I’d like to ask: if you don’t already know for certain, please preserve any evidence, digital and physical, that might indicate why he died. If it was the result of one of his self-experiments, then I think he would want us to know.

[EpicEng]

Not really that odd considering his line of work. I'm sure a number of people have replicated his experiments on themselves and are now understandably concerned.