1935 Indianapolis 500

Despite attempts to improve participant safety by requiring crash helmets and installing green and yellow lights around the track, the event that year would prove to be one of the worst in terms of fatalities.

Rookie Johnny Hannon, on just his first lap at racing speed, had his car go over the outside retaining wall and was killed from a fractured skull.

Later that day, driver Hartwell "Stubby" Stubblefield also had his car go over the outside wall, and both he and his riding mechanic Leo Whitaker died from injuries they received being thrown from the vehicle.

[5] Driver Clay Weatherly would beg Leon Duray, the owner of Hannon's crashed car, to allow him to drive it in the race.

Petillo easily broke the record for the fastest average speed (106.240 mph) despite being slowed somewhat by rain near the end of the race.