Go into the wall shown on the video, then align the cross.
Run up to the manhole and jumpthrow.
If performed perfect then all haven will be smoked, if not, everything behind heaven doors will be smoked.
Hard to perform.

Command to reproduce the pos and angle:

setpos -636.353027 -2029.968750 214.360779;setang -4.729996 112.320061 0.000000