So, do we have an idea of what happened during the Marine footage ?
When he has the flame thrower and they get attacked by a Xeno. He's trying to fry it, but he doesn't quite get it, does he ? Then the Alien gets close to the other Marine and explodes.
What I'm wondering :
Did the player actually reach the Alien with the flames, but it didn't catch on fire for some reason ?
Was the player unable to reach the Xeno before, and when he finally did, the flames caused it to blow up ?
Was the reason why the Xeno blew up related to something else ? Maybe something the other player did (like firing a grenade from close range) ?
I hope it's the latter and the flames can actually set people on fire.