Lumrolur slips outside going from the point Oscar already checked and going a bit outward and up looking for signs that professional infiltrator would leave (very little), but that maybe an engineer wouldn't think to look for. Specifically, maybe the tool is still close by, just set against the beam above normal line of sight. Most civilized people don't look up because there is nothing from above that can kill them. Jungles, and caves, are dangerous in three dimensions so he looks around the place, checking the space up to first floor.
OOC:
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Investigation +2, Perception +6, Survival +4; looking around: Athletics -2, Acrobatics +5, Insight to "get into saboteurs head" +4
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