This bounty mission should be very easy given all the "direct" flights from Cape Town to Perth. The distance according to google is 5,401 miles. Some travel websites show direct flights under 8 hours. But every other option aside from these "direct" flights are all around 30 hours.
Travel from Perth, Australia to Cape Town, South Africa (or vice versa) in under 10 hours, and document it with un-deniable proof.