You might be interested in this: http://www.executivechute.com/
The specs are here for the ol round chute, that seems to drop pretty quick from "125ft" (wow!):
http://www.executivechute.com/products.html
And call me a newbie, but if you are in a position to have the corner office on the 99th floor, you have the $ to look into proper training, and hopefully have the knowledge that this cheap chute isn't the answer. But, hey, I dont have the fancy office!