Scott fired into the creatures energy beam causing it to explode and he got behind some rubble in time to avoid getting incinerated before standing up and charging straight at the hulking machine, sliding between it's legs and shooting it in the back. This thing was tough but with enough successful hits it'd eventually go down.
It yelled 'Death to the heretics!' Scott ignored it because it was nothing more than the ramblings of a madman and continued pressing his attack on the big shiny target.