How to make a prop which is nocollided on one side?

[SL1CHAOS]

I would like to make a prop which is nocollided only on one side. It is so that people may walk through it but may not return the way they came.

[b]Is this possible?[/b]

Thanks

[Natahster]

No, thats not how they work. I don't know of any addons that do that either. And actually, if it was nocollided on one side, they'd be stuck in the middle. I guess you can nocollide it, then when someone walk through un-nocollide