Towards the end there was a scene with the initial victim being killed and the builder - an inventor - walking out looking smug.

The two who got trapped in the current time came in through a skylight into the utility room (which they didn't find on the first search through the apartment). The man - either before he got caught in the death trap (which is likely, since it had metal walls and probably lousy cell phone reception) or on going through the skylight - called his girlfriend for help. He got caught in the metal-sided box which roasted him to death. His girlfriend came through the skylight (they found her fingerprints on the floor of that room) and, I suppose while looking for him, got trapped in the tank of water (gee ... it held water for 80 years or so and then, with one person falling into it, immediately started leaking into the apartment downstairs).

Thinking it through, there are a number of holes in the logic, but I wish it had gone into more about the various traps and triggers and the mind and motivation of the man who built it.

okay, that's clear. yeah, because it is unclear to me why someone would go to that kind of effort and expense to kill one person.

The inventor wanted to punish the guy who got impaled on the angel blades. Angel blade guy had been stealing inventions from him.

And then it ceases to make much sense.

The guy who built it died of natural causes 30 years ago.

I think the realtor got into the hot room from wherever they crowbarred in from. But they never showed an access switch. The vase touching led to the room they had to reorganise to look like the portrait which then led to the hot room, so that's how they knew that was the first time that trigger had been used.

There was also access to the easy-bake room through a closet - they got out of it that way.

There was also access to the easy-bake room through a closet - they got out of it that way.

Am I recalling correctly in that they showed us three trapped and killed or near killed people and didn't show us how any of them fell into their traps?

The old victim, yes - there was a scene set when he was killed towards the end.

Is facebook being crap for anyone else?

Facebook is always crap for me. It won't let me post or click on buttons in Firefox @@

Sometimes the posting thing gives me issues in Firefox, but I thought it was a Ff/PC combo issue because it does fine on the Mac.

Right now I'm unable to get there period.

The old victim, yes - there was a scene set when he was killed towards the end

But did they ever show why he not only stuck around but reshuffled the tiles to prime the trigger? That's what I missed. Was he locked in? Did he think he was working to get out and it was all a big lie?