You light the filter of a cigarette.
You have no more weed, no more money, and no cigarettes, so you go around, smoke all the shorts that are of decent length despite their age, and take the other ones and empty the tobacco out of them to roll cigarettes with tobacco in them that in some cases is months old.
Your the driver and you get in the passanger seat after smoking and try and put the keys in.
You break your gf's bowl just to scrape the resin.
Smoke your collection of stems.
Eat the stems and seads when your paking up more bowls. (I do that when I'm sober too though

)
Accidently kiss your gf's sister thinking it was your gf.
Lose your bowl....when its in your hand.
Try to open the door to your car wondering why the key doesn't work. Then noticing that your trying to open the wrong car.
Lose your supertroopers DVD in the DVD player.
Trying to start a conversation with your computer.
And last but not least, you know your stoned when you end up at the waffle house.