2. Wish you had dressed like Chewbacca.
3. If you have to go outside, you could be Dorothy Gale,
4. Or if you're stuck inside, you could be Dorothy Gale.
5. As you watch tree limbs, your garbage cans and several small children blow by, decide you really don't want to go out tonight. Instead, choose to dress like a hermit:
[I guess, technically, an Obama costume could also be deemed a "hermit" these days, but only a few gross teenage boys would ever consider wearing something so disgusting and evil.