This one, when I tapped the bucket, ran away quite fast, doing a couple of little skips/bounces as it went. I have caught them for relocation using the method Dujon described, but usually I just leave them alone. And yes, I've seen much bigger, Dunx, but let your good wife be not afeared - the big fellas like that really are quite harmless. And soft/light/delicate/shy.
The actual programmer of PantsMC, apparently called Tim, has completely disappeared from the net years ago (and never, in any case, played MC, being no relation of the _tim_ who appeared on Old York and was infamous for Really Bad HTML.)
(PantsMC was, despite its best intentions, probably never the equal of the Old Delphi server...)
Like I said, this isn't a spider. This was perhaps a 45minute stroll from the centre of the city, and it was pretty dark at 6:30pm. It's near the top of the largest hill in the area, which isn't too far from the river. Brisbane is fairly green. I don't know how I noticed it, as it was about 5m away, diagonally upwards. Look here and then here.
I take no responsibility for heebie-jeebies.
I hope the games can at least be recovered...