When your mom walks into your room while your jacking off, and she says, “The cucumbers are ready!” She drops them on her toes/feet while you nut in her face.
You’re so high on weed (hence, “green” out), that you are totally useless. Common effects of greening out would be horrible munchies, motor functions are almost gone, you can’t speak coherently, memory loss from the night of, nausea, vomiting, etc.
In other terms, it’s like getting blacked out drunk, but instead of alcohol, it’s weed.
Jason: Dude, last night I got so zooted I couldn’t even walk.