Hmm. Well, its not really a case of finding samples, as using a scripting language is pretty general.

In my engine I use LUA to script "emitters". An emitter script simply runs for a short amount of time, calling API/engine functions exposed to the script layer for creating particles and geometry objects. Then you can create these emitters either dynamically from the API, by script from an entity (eg for casting spells or firing a machine gun), or from the level-script (for steam vents etc).

Id be more than willing to give some more detailed information if you think it would help.