[SP] 1971
I'm not sure what you mean by "then you go past portal." Even if you fall down onto the water-level panel without having placed a portal there, you can still escape. There's another portal-able panel visible from down there.
The thing is that if you try it you gona see that then you travel in low speed past portal there you will trigger water sound and trigger_hurt and that kills you, it is not a problem if moving at high speed but at low speed it is. so the problem it not of not having any other placement of portal but that the trigger_hurt kills you.
That's very strange. I'll have to look into that. I know that placement helper isn't higher than normal. Does this happen regardless where you exit? Or is it on the first exit from the tall, down-facing tower?
strange i loaded the map again to be able to describe it better but this time it works as it shod.
but the problem was then entering the portal in picture of " BlumCoLe " YouTube clip.
Loved this map. My favorite part of the original game were the cave johnson era levels and this map feels like something that would have fit right in with those.
I created an account just to log in and confirm the bug noted above with that water level portal. I should probably preface this by saying I'm not an elite portaler and sometimes end up missing jumps, missing placements, or a combination of the two. In this particular case I managed to find this insta death by missing the portal. I landed on the platform next to my portal and then when I attempted to enter the portal, instant water death. What made it worse is that I sucked enough to actually do this about three times in a row before finally falling gracefully into my portal. Luckily your judicious use of autosave spots made this not that painful of a bug.
Here's my speedrun of this map. I really like the old-style maps, but you have a few things to fix in this one 
Good. Job. Test. Subject.
(but seriously, I enjoyed this map. I love the underground style and this puzzle really just added to it [the experience]. I also had some issues with the part with the debris but nothing else bug-wise. But, for some reason I had to noclip out the beginning elevator as it stopped for me.)
please
...and here's the Workshop version:
http://www.steamcommunity.com/sharedfil ... =100726417
Click my Steam Profile image to view my Portal 2 Workshop!
Single Player Tests - Excellent Partnership (Coop) - Single Player BEE Mod Tests