Power's incident was the third of the day after 2016 Indianapolis 500 winner Alexander Rossi spun on the warm-up lane and four-time defending Indy winner Helio Castroneves spun out of the warm-up lane into the Turn 2 wall, prompting the test to be prematurely concluded.
The 2018 Indy 500 winner completed a 360-degree spin on the strip of grass that separates Turn 1 from pitlane exit. As he gathered up his Team Penske machine, its rear hung over the racing line at the apex of Turn 1 when Herta arrived on the scene.
