Avakuss takes a look at the tracks then moves to the far side to look down the next tunnel in case they've attracted company and to see if there were tracks over there too (and which direction).

Spoiler: OOC
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Extended Steadfast Perception, 9PP. Lasts 6.3 hours. Immunity to all figments and glamers (such as invisibility). +6 Spot and Search.

Listen: (1d20+10)[24]
Spot (1d20+25)[39]
Survival (on tracks) (1d20+10)[28]