Getting a Tattoo
Solving a Rubik's Cube
"The razor-toothed piranhas of the genera Serrasalmus and Pygocentrus are the most ferocious freshwater fish in the world. In reality they seldom attack a human." The skydivers had only 1 minute to text message the phrase while freefalling from 12,000 feet (3.655 meters) before pulling their parachutes and gliding to the ground.