A roll of 1 on a d 20 is not only considered a failure by some roleplaying groups , it ' s a catastrophic failure . The DM comes up with a scenario where the failed die roll isn ' t just unsuccessful , but has some other fallout as well . I think the example was meant to emphasize the catastrophic failure part more so than the actual math . <| sep |> Acquisition Details this is a stack of 82 images each shot at 300 mm f 6 . 3 ISO 12800 15 secs . I had my camera mounted to a vixen polarie but I didn ' t not have great alignment . <| sep |> Yeah , I assumed . How do I find and trade with you once in the plaza ? <| sep |> I got an invite on my other account that I lost access to . I don ' t remember there being a lot of activity on it , though .