[TAS] Doom 2 Map 21 Pacifist Co-op in 0:04.09
It turns out, this trick is possible with a damage boost given by another player. Turbo speeds and self-inflicted rocket boosts manage it but they can't be done in a regular individual level demo.
The original plan was to get the second player behind the first one, doing the same glides and all that, and shoot them directly in the back. But there's not enough space in that area for a second player to fit in there, so I had to fire through this gap instead.
4.09 is really annoyingly close to 3 seconds but there's some factors that don't really allow the time to be pushed lower. If the second player enters the tele a frame sooner, it telefrags player 1. There's no way to manage a tele unstuck trick by taking damage at any of these points. The curve of the second player around the corner could be better, but while it might save a single frame and allow player 1 to be shot sooner, it definitely wont save the 4 frames needed for a 3 second demo.
Putting this as pacifist instead of UV-Speed because I've seen another demo where players shoot each other but don't damage enemies that was still counted as pacifist.