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

WATCH: Astronaut Scott Kelly put on a gorilla suit and floated around the International Space Station, surprising the other crew members. His twin brother, Mark, sent him the costume in a care package. | Global News