How about the time I didn't ;-)

So at the time medical weed was legal, recreational wasn't, I did not have a doctor's recommendation.

Driving home from a friends house after midnight I decided to hit up the 24 hour grocery store and get some cereal and milk. I had less than half a gram in the passenger seat back pocket. And expired tags.

Woop-woop: party in my rear-view mirror. The encounter goes bad from the get-go. They tell me to get out, ask for permission to search, which I deny. They then explain that they can tow and impound my vehicle for the expired registration (it was really expired) and will search it anyway. So I consent to the search and it gets worse!

I'm diabetic and I have a used syringe in my arm rest compartment with the needle poking through the plastic safety cap... and it sticks to one of the cops finger.

Now they are convinced I'm a degenerate heroin addict or something. They find the pill case on my keychain... I explained it was my ADD medication and they threatened to arrest me because it's not in a proper bottle. They test it with a reagent kit and accuse me of lying because it lists the generic name and I gave them the brand name.

And finally one of them finds my pathetically tiny stash.

Busted.

Fortunately the quantity was to small for serious prosecution so I was forced to attend an all day class. And that's how I got a cheap paper certificate that say "For the Successful Completion of Marijuana"