Oh, sorry. The word "Catalytic" Threw me off, since I know a catalyst to increase reactons...
Bad Idea: Trapping unwanted mice in your basement, leading to overpopulation of said mice. Rather than kill all of them, you buy a Burmese Python to eat them all, but then he grows to be 19 feet long, and eats you.
Good Idea: Apache Longbow Helicopters.
Xer0 \^/