What's something cool you can do in 30 minutes or less?

Are you an expert in something that takes less than 30 minutes? We all know you can make a terrific meal in under 30 minutes but what can you do in that time that would take most people much longer? Maybe you know how to tailor a suit or do a make-up make-over or assemble a room of furniture all in 30 minutes or less. Is your method fast and easy and you're ready to share it with the world? If you have a unique skill you can do in less than 30 minutes, we want to hear from you!