Level 8 Armor grab

[eggmatters]

Hello there, Not sure if I'm just out of it or if this is another door shuts too fast delay. In level 8, there is a room - right before the 4 color key switches hallway. It has an obvious alcove that when touched, opens up to reveal an armor vest. It is raised up and you can't just grab it however.
I've tried running along one of the upper ledges to the door; opening the door and then trying to make the jump from the ledge (auto-run is on). I've looked all over for some other switch or ledge but am coming up blank? Is this a bug or am I doing it wrong?

Thanks!

[Catoptromancy]

Just run straight to it, land on ledge, then open door. It is not easy.
http://ftpusers.coffeenet.org/~cato/freedoom/demos/map08-armorjump.lmp

[eggmatters]

Thanks for that. I vaguely recall making jumps like that in Doom1 and 2, but not being quite so difficult. Maybe I had more patience back then.