Smoke much? Wow.
All that said, though, I often wonder if people who come off like that in interviews are really that out there or are they playing the interviewer. Back in the day, I was involved in a guerrilla group that would purposefully seek out situations to play upon unsuspecting people in public situations. I know a few guys who made it their target to be wherever there was "news happening" so they could be interviewed on camera. Some of the local producers got to know them fairly quickly, though: they were really quite good at leading the reporter on!
One of the guys went on to do a faux religious broadcast for years - made a lot of money from it!
Anyway, the guy in this video would be an excellent candidate for this kind of prank, save for the fact he didn't lead the interviewer down the path very far. Too bad.