Race winner Louis Schneider, who led the final 34 laps, was accompanied by riding mechanic Jigger Johnson.
One of his errant wheels bounced across Georgetown Road, and struck and killed an 11-year-old boy, Wilbur C. Brink.
Arnold suffered a broken pelvis, and his riding mechanic, Spider Matlock, broke his shoulder.
Diesel entries were allowed a special rules exception, given them a guaranteed starting position provided they complete their run at a speed of greater than 80 mph.
Cummings first attempt early in the day started out with a lap of 115.001 mph, but he suffered a failed clutch.
Officials decided to allow the run, and his four-lap average of 113.848 mph tentatively took the pole position.
After the run, some drivers protested, and during a post-qualifying inspection, it was found that Arnold's brake cables were not connected.
During the rush to get the car on the track, the crew had neglected to connect the brake cables, and technical committee chairman Louis Schwitzer disallowed the run.
During a practice run, the car of Floyd "Sparky" Sparks caught on fire down the backstretch, ignited from an oil or gasoline leak.
Gulotta left the Bowes Seal Fast team and instead moved over to the Hunt Special entered by Ab Jenkins.
Lou Moore tried to qualify Pete DePaolo's Boyle Valve Special, but a broken clutch prevented the attempt.
[22] The day was marred by the fatal accident of Joe Caccia and his riding mechanic Clarence Grover.
Caccia was on the track in the morning for a practice run, when the car skidded out of control entering turn 2.
The car ripped a hole through the outside retaining wall, hurtled 100 feet down the embankment, and crashed into a tree.
Still yet to qualify was Shorty Cantlon, who practiced unofficially over 118 mph, but suffered a broken universal joint during the day.
Duray had been suffering from overheating issues all week, and observers noted he qualified with water boiling from the radiator, indicating the problems were still not solved.
Billy Winn and Herman Schurch both took to the track for shake down laps at slow speed, and practiced for only about 45 minutes.
The cars were brought to the garage for adjustments to the springs and shock absorbers, and later in the afternoon were safely qualified to the grid with only about 20 laps of practice each.
Officials deemed that DePalma had not arrived in enough time to qualify, and the car he was to drive had not shown sufficient speed.
Shaw took to the track for a qualifying attempt late in the day, but he pulled off with a broken crankshaft before starting the run.
After suffering constant overheating problems during practice and time trials, Leon Duray pitted his car after only six laps.
Drivers were required to slow down to about an 80 mph pace, and passing was not allowed unless except those cars that entered the pit area.
Only a few laps later, the yellow flag came out again when Wilbur Shaw (driving relief for Phil Pardee) wrecked spectacularly in turn three.
Ralph Hepburn was running second, Tony Gulotta third, Russ Snowberger fourth, and Fred Frame fifth.
Louis Schneider made his first and only pit stop on lap 106, taking on gasoline and oil, as well as changing the right rear tire.
After surviving a spectacular crash in the first half, Wilbur Shaw was back in the race on lap 118, this time driving a stint of relief for Jimmy Gleason.
A wheel from Arnold's wrecked car bounced over the wall and across the street, striking and killing an 11-year-old boy playing in his yard.
Cummings hit the wall in the south short chute on lap 177, leaving Schneider all alone out in front.