Small amounts of finite improbability
can be generated by hooking the logic circuits of a Bamborweenie 57 Sub-meson Brain to an Atomic Vector Plotter suspended in a strong Brownian motion
Generator (say a nice hot cup of tea
They are often used to break the ice at parties by making all the molecules in the hostess' undergarments simultaneously leap one foot to the left (in accordance with the theory of indeterminancy).
This was used as the basis for creating the Infinite Improbability Drive from The Hitch-hiker's Guide to the Galaxy by Douglas Adams.