The halo was credited with saving the life of Alex Peroni after his vehicle became airborne and crashed during a Formula 3 event at Monza on 7 September 2019. It also played a critical role in protecting Romain Grosjean at the 2020 Bahrain Grand Prix where, after hitting Daniil Kvyat's car, he crashed into the barriers head-on. The car split the crash barrier, allowing the car to slip through in between and splitting off the back of the car from the safety cell. The halo hit the upper section of the barrier, protecting Grosjean's head from the impact. In a similar accident at the 1974 United States Grand Prix, driver Helmuth Koinigg was decapitated. Despite initial concern over drivers' ability to evacuate quickly being impaired by the halo, Grosjean was able to climb out almost immediately, which was critical as the car started burning instantly. He emerged from the flames, with burns on his hands and ankles, and non-life threatening injuries. "I wasn't for the halo some years ago, but I think it's the greatest thing that we've brought to Formula 1, and without it I wouldn't be able to speak with you today," Grosjean said from his hospital bed afterward.