Never got to visit the Hargrove Mill myself before they knocked it down, gutted about that honestly. But shadow figures in old industrial buildings seem to crop up a lot don't they. Theres something about those places, all that residual energy from years of workers, accidents, long shifts.
Did yours appear in a doorway or was it more out in the open? I've only caught shadow figures twice on my own investigations and both times they were framed in doorways which made me wonder if its a threshold thing, like they're drawn to liminal spaces.
Would love to hear more details if you've got them. Anyone else been to a demolished site and picked anything up beforehand? I sometimes think the activity spikes right before demolition like whatever is there knows something is coming.