While everyone else search the building, Marius goes north to the spot where the tiny flying construct has exploded. The spot itself is clearly marked by a circle of scorched grass. There are some trees and tree stumps to the right of it, but what is much more interesting, there is a whole bunch of what seems like giant mole holes to the left of it. The holes seem eerily familiar now, after what you have seen in the barracks. Some are larger than others.