L810C and Chris Kane both send similar news of a fun bug to play with in the new Q3ATest using the cheats mentioned earlier (story), and the lightning gun. Here's L810C's explanation:

I was trying the Devmap and the Give All mentioned in an earlier post when I found this wierd bug. Use Grapple and grapple to something and hang there by pressing another weapon. Then use Lightning Gun and you will be propelled anywhere you aim it, you will be tethered to your original grapple spot, but can go anywhere. You can fly to the upper limits of Q3Test2 and you can fly into other rooms in the other levels. You can fly through tele's, but bounce pads will break it.