Back in the day, when I was just a young toker...
I drove a Chevy Conversion van my parents had naively let me use, and on my first college break, my friends and I decided to park in the middle of an empty parking lot, on federal property, clearly visible from a very busy parkway.
Sure enough, an undercover cop pulls in (later we learn he just was going to take a piss) and parks right across from the van, and shines his brights on us.
Rather than hiding and waiting for him to leave, we panic and try to drive away. Of course he blocks us and puts the lights on...
Soon he has all of us besides the van with the sliding door open, and using the phrase "Son, do you want to take this van home to Mom tonight?" has us dig out all the pipes and tiny dime bag of weed we had hidden, and lined it up on the van floor.
By this time he has another patrol car on the scene, and now he gets all our ID's, and now his new phrase is "Son, do you like to fry your brains at (whatever college was on the ID), repeating the ritual on each of us.
Talk about a buzz kill.
Finally, he apparently decides we are not worth the paperwork, or we'd all get charged with a crime on federal property, and as you know, Uncle Sam don't play nice. So, he lines us up again, and one by one, hands us a pipe or whatever and asks "Son, is this worth going to jail for?" to which the expected response is for us to say no and throw away the pipes into the brush.
He lets us drive away, high as fuck, and much smarter about where to park.
Of course, the next day, we go back and find all our pipes in the brush, plus I found broken TM bong which I was able to repair and use for years later until my Mom found it.
Ahhh, to be young and stupid again...