In a fun Halloween twist, astronaut Scott Kelly gave the crew on the International Space Station a playful scare! On February 24, 2016, nearing the end of his year-long mission, Kelly donned a gorilla costume to surprise fellow astronaut Tim Peake. The video shows Kelly chasing Peake around the ISS in a zero-gravity prank, bringing a bit of "trick or treat" fun to life in space. Kelly shared the hilarious moment on Twitter, saying he "needed a little humor to lighten up a Year in Space. #TrickOr

Meanwhile, aboard the International Space Station, astronaut Scott Kelly sent his heartfelt best wishes and congratulations to the New Horizons team after the spacecraft's flyby of Pluto earlier today. Kelly is on a one-year mission off the Earth, performing important research that will help enable human visits to other worlds in the future. #PlutoFly #YearInSpace | NASA - National Aeronautics and Space Administration