One Arkham Encounter Card for The Unnamable location reads as follows:

You hear the scurrying and squeaking of a horde of rats from inside the wall. Abruptly, you realize that they are moving to surround you. Pass a Speed (-1) check to make it to the front door first. If you fail, you are lost in time and space.

Since there is no specified result for passing the speed check, a passed speed check would be a default "no effect; nothing happens" result, according to the rules.

Given what's happening (the investigator is beating feet to get to the front door before the rats cut him off) if the investigator passes the test (in getting to the front door first), shouldn't he continue (safely) to the street? As the encounter is currently worded, the rules say the investigator remains in The Unnamable, unaffected, but only IF he's able to pass the speed test and gets to the front door before the rats.

For comparison, here's another encounter for The Unnamable: The ceiling beam suddenly buckles. Make a Speed (-1) Check. If you pass, move to the street. If you fail, lose 2 Stamina.

I think in both cases the speed check is to make it safely out of The Unnamable and into the street. It makes sense to me, but I've recently discovered that what makes sense to me is not necessarily the actual rule in AH ;-), so I'm here once more, asking for clarification.

Thanks!

As a general rule, if the card does not instruct to move to the street, then you don't. Thematically this could suck, but still, I'd play it as written. In addition, if you want a thematical reason for this, maybe it's enough fleeing from an upper floor to the basement, or just outside the house (maybe there is a small meadow? who knows)

Actually this has been bothering me as well. Personally I don't move to the streets since nothing on the card or in the rules says so.
I guess the Unnamable, being a big house, has some sort of garden where you could take a breather or keep investigating.

Maybe you're just right outside the front door. That doesn't put you into the streets.

Iirc, 'move to the street' is one of those phrases which does have a few ambiguous variations, i.e. encounters which say something like "you find yourself outside in the street with no memory of what happened" etc. I don't think reaching the front door should necessarily be one of them though.

The old house in 'The Unnameable' is next door to a graveyard, or it has graves and old tombs in its garden. The short story just consists of the narrator and his friend loafing about in the garden, talking about the house, but they never go in it. Then a big monster jumps out and scares them. The end.