On lap 7, the second lap at racing speed, Senna's car left the racing line at the 190 mph Tamburello corner, ran in a straight line off the track and struck an unprotected concrete barrier. Telemetry shows he left the track at 310 km/h (190 mph) and was able to slow the car down by braking to 218 km/h (135 mph) in slightly under 2 seconds before hitting the wall. The car hit the wall at a shallow angle, tearing off the right front wheel and nose cone, and spun to a halt. After Senna's car came to a halt, he was initially motionless in the cockpit. After about ten seconds, from the close-up aerial footage, his head is seen to move about one inch to the left before returning to where it was. Then, he never moved again. What appeared to have happened was that the right front wheel shot up upon impact and entered the cockpit, striking the right frontal area of his helmet. The violence of the wheel's impact pushed his head back against the headrest, causing fatal skull fractures. A piece of suspension attached to the wheel had partially penetrated his Bell M3 helmet and caused trauma to his head. In addition, it appeared that a jagged piece of the upright assembly had penetrated the helmet visor just above his right eye