Five shells in the magazine. One in the chamber. Nice soft lead buckshot that won't go through walls.
Practice firing from the hip. Don't shoulder the shotgun unless you have the time.
Call the cops. Yell that you are armed and will kill them. Give them the opportunity to retreat. If they don't and you feel that your life is threatened... Unload.
Jack.
Why wouldn't you have the time? If you started with it on your shoulder, would you have the time to bring it down to your hip? Maybe I'm being a little cranky today but where are you people getting this stuff? Shotguns that don't have to be aimed? Shooting from the hip? Racking the slide when confronting possibly armed assailants? What's next? Advocating the Linda Hamilton one handed chambering?
If you have time to put it on your hip, you have time to put it on your shoulder and do it right.
Firing from the hip is not something that is taught by *any* serious instructor that I'm aware of.
If you think you don't have time to aim, what you really don't have time for is a miss. Always aim.