
various credits on:
The Banished Vault
Arcsmith
John Wick Hex
Quarantine Circular
Subsurface Circular
Vienna Automobile Society
Sun Dogs
P&P microgames:
In the Court of the Skeleton King
The Garden
Tallships
Chicago
The less pure version I was taught was a scenario where someone is bouncing a ball off the floor inside a train car passing by you. Same thing but ball.