B window smoke

Stand still and jump-throw: hold left click, then jump and let go at the same moment.

From upper tunnels. Stand against the yellow wall, left of the green window grille (the B doors smoke's spot). Aim at the wall right of the vent, under the roof edge.

Practice (with sv_cheats 1): setpos -1332.03 491.97 8.03;setang -50.05 89.05 0