1, try to remember what it was.

You forgot a lantern, in case it gets dark.
Do you:

1) take your chances with the woods
2) go get a lantern

2, go get a lantern.

you manage to lend a lantern.
Do you:

1) Back down. This is dangerous.
2) go to the woods. You're in debt

2, head to the woods.

After a while of looking in the woods, you find an old, abandoned shed.
Do you:

1) Ignore it
2) Investigate

2, investigate

Inside the shed, there's nothing. At least, you think so at first. You trip over something, and realize that there's a trapdoor.
Do you:

1) Investigate this
2) go back to finding the monster

1, investigate this

You open up the trapdoor to find rusty iron ladder rungs leading downwards.
Do you:

1) Proceed
2) Nope. Nu way. Too suspicious