The sound of a few budget forecasts being gently torn up around the world...extraordinary.
Lower oil prices have a mixed effect on Australia's economy, but mainly a positive one - inflation should come down a bit, and it's great news for transporting businesses and companies with high fuel costs.
On the other hand there will be some budget impact to tax revenues since Australia is a net energy exporter, and energy stocks will clearly be impacted.
Santos (STO) shares dived by a massive 13 percent on Friday, with much more now to come next week.
Gold has fared somewhat better, declining by around 2.7 percent at the time of writing.