LOL, GBFFL!
I would be hard on him as a juror. Not because he smoked pot, but not having a valid license is being a poor citizen. There are responsibilities in life to the community one lives in.
Speeding @ 24 over (79 in a 55) is just....stupid. Doing it without a license is... stupider.
I might give him a pass on being stoned. I'd be much more interested to know if he was actually impaired to the point he was having trouble controlling his car before I make a judgement.
Like I'm not already...