You would have, really, but you stubbed your toe, and it hurts
Your horoscope was bad for today
Your dentist told you not to
The sun got in your eyes
You've just gotten to the good part in your book
Your neighbor told you not to
You left your blaster in your other pants
They're finally letting the T-Rex fight in Murcheson's Ditch
Your dog told you not to
You just made yourself a nice mutton-lettuce-tomato sandwich, and if you dash off now, it'll taste icky later.
Look, an obvious distraction!
The voices in your head told you not to.
Starbucks has run out of coffee
You don’t think you can handle success
You don’t think you can handle failure
The man on the television told you not to.
Want to save electricity.
Your chair isn't comfortable enough.
It's too cold.
It's too hot.
Your back hurts.
Familty pet is in the room.
Family is in the room.
The car is dirty.
Because he's dead Jim.
Too thirsty to do anything.
Ah, meditation time already?
It's probably not going to work.
Your pilot has a bad case of crashing.
You have to floss your cat.
The President said he might drop in.
It's your parakeets bowling night.
You need to work on your cottage cheese sculptures.
Too young to die.
You have to check the freshness dates on your dairy products.
Your subconcious told you not to.
You left your body in your other clothes.
The socks you are wearing don't match.
You feel a song coming on.
A group meeting is on.
Look, it's just plain nasty down there, and the only options are victory or death. You can't flee (and take that shiny battleship with you) until you are victorious. There's some big blob things (and they're nasty in their own right), and they breed little flying blobby things! Make sure everyone has at least a little armor, because you're going to get swarmed by little bitty blobby bats!
Your sole reprieve: at least nothing down there has ranged weapons.