I have actually done this. I used to work for the Cincinnati Reds and before a game we launched quite a few discs from different places when they were still at "Cinergy Field" (Riverfront Stadium for all you old folks). The most fun was throwing from the upper levels -- on a good throw you can toss one to the other side.
Nice, I need to get me a job with the Rockies... Someone ought to be having some good luck at that park cause Lord knows the Rockies aren't doing it...