Is caffeine explosive or did you mean to type some other word instead?

It's been four years so my memory might be faulty but if I remember right it was caffeine. Normal dosage of caffeine that Wikipedia lists is 500 milligram.

For obvious reasons the part where he allegedly spoke about it isn't in the video. I allegedly told the audience that he will demonstrate the explosive capabilities of the substance later that day. Unfortunately there was some official of some agency in the audience that didn't find this funny and who then walked around with recording equipment to record any further word that Sai said, so Sai didn't go into further details.

It's illegal to carry something on a plane that can blow up the plane but obviously TSA rules can't check for every possible substance that's explosive. The idea that fluids are the only thing that's explosive is obviously also mistaken. Disclosing security vulnerabilities is very much in the spirit of the Chaos Computer Congress. So it was the substance he choose when they illegally forbid his fruit juice (and he sued them for not allowing him fruit juice with he carries with him for health reasons, a bit later)

For me Sai was a very impressive character.