Quick story
i know a guy that had a 2015 Rush 800. End of season he decided to check compression. He removed both side panels and the hood (including key switch and gauges). Taped throttle open, removed one plug and left the other one in. He hooked up the compression tester in the other hole.
First pull, the thing starts up with approximately 75 very angry horsepower. It takes off with impressive speed straight through a grape arbor about 75 yards away. After the grape arbor it continued about 1/4 mile through a farm field to the neighbors house. It smacked a parked Pontiac and ripped the entire front bumper cover off of it then cartwheeled across his driveway. It came to rest upside down and still wide open screaming.
Good times.