The same stoner comes back the next day and says, "Got any weed?" The man behind the counter, although somewhat annoyed, replied, "No sir. We don't sell marijuana." So the man went home.
The stoner returns again to the gas station later that day. And once more, he says to the man working there, "Got any weed?" By this time the gas station man was angry. He yells, "You stoned' refer-smoking', burn-out! I told you, we don't sell that stuff here! If you ever come back in here asking for weed again, I'll nail your feet to the floor. Got it? Now beat it before I call the cops." So the stoner left.
The next day the pothead went back to the same old place with a dopey smile on his face. He went to the cashier and said, "Got any nails?" The man hesitated, then replied, " no sir, we don't sell nails here." The stoner grinned. "Got any weed?"
