The controversial red flag ahead of the Americas MotoGP race was thrown for safety reasons, which prompted the complete restart.
After rain fell shortly before the race start, the red flag shown by race direction just before the warm-up lap, moments after polesitter Marc Marquez abandoned his bike on the grid set up for wet running to switch to his dry bike in the pitlane.
Upon seeing Marc Marquez leave his position and his bike, nine other riders followed him, creating a mess, with people running up and down the pitlane in complete confusion.
