Prost was the second group 's slowest competitor because he bent his car 's steering arm when he came into contact with a trackside bollard .
This speared competitor into the wall at a 45 - degree angle at high speed leaving the turn fifteen and sixteen chicane .
Prost was the second group 's slowest competitor because he bent his car 's steering arm when he came into contact with a trackside bollard and this speared him into the wall at a 45 - degree angle at high speed leaving the turn fifteen and sixteen chicane .