According to Fox Sports, Carpenter's car got loose and hit the Turn 2 wall. As you can see in the video above, the vehicle then flipped over and slid along its roll hoop down the track, while sparks shot out. Like Castroneves and Newgarden, Carpenter wasn't injured in the crash.
To reduce the likelihood of this type of accident during qualifying, IndyCar officials forced teams to lower the turbos' boost to cut about 40 horsepower. The cars also had to use the same bodywork as for the race to further decrease speeds. Scott Dixon earned pole position for the race on May 24, and Will Power and Simon Pagenaud round out the rest of the front row.
You can see the crashes from Newgarden and Castroneves below, which prompted the rules change.