> Get up and look around
There really is a store here. Unfortunately, the only thing they sell in this nondescript store are Grue skins. There are a bunch of prissy pool sharks in tuxedos hanging around playing billiards in a back room. And, since you don't look like a customer, the surly manager of the store is looking you over with disapproval.
You seem to have lost your revolver falling through the portal, and the bullets fell out of your pockets when you crashed through the store's double doors.
> Look around for weapon
Fortunately, there is a rusty knife collecting dust in one corner. Oh, well, it's better than nothing.
> Pick up Knife
You now have a Knife.