The Impossible

One interesting feature of the Disc Universe, Ponder Stibbons has noticed, is that a great many things aren't impossible until they are tried. Once they are, however, the Universe catches on, and it becomes impossible. Mr. Stibbons uses Hex to perform lots of very small, very quick spells in succession, and then measures the time it takes to become impossible.

As Archchancellor Ridcully notes; "It's like pullin' away the tablecloth before the dishes have a chance to realize that they oughta be fallin' over. Prolly has somethin' to do with quantum..."

The unfortunate effect of this is that many very interesting impossible things have been done, and thus been made completely futile by complete idiots, who went ahead and did it, instead of waiting for professionals, who could have made a much better job of it.