Here you go.
It's not right before the event, but if you position Evan Clark at the spot and shoot the pump, he will get bugged. When I tried now, he got unconscious because of the smoke (last time he didn't), with no way to heal him, yet I can still select him in the list of soldiers at the top of the screen and give him move commands. At the spot on the ground, where he crouched, there are just lot of Destroyed Items, one of them blood spat looking (so I guess he is dead, alive and unconscious at the same time, heh).
user_29-106.json