In racing, a small bump can have big consequences Here is a look at some scary scenes in the dangerous sport ROBERT WICKENS - POCONO RACEWAY AUGUST 2018 JAMES HINCHCLIFFE - INDIANAPOLIS MOTOR SPEEDWAY 2015 JUSTIN WILSON - POCONO RACEWAY 2015 DAN WHELDON - LAS VEGAS MOTOR SPEEDWAY 2011 ALEX ZANARDI - EUROSPEEDWAY LAUSITZ 2001 GREG MOORE - CALIFORNIA SPEEDWAY 1999 AYRTON SENNA - SAN MARINO GRAND PRIX 1994 GILLES VILLENEUVE - CIRCUIT ZOLDER 1982 PIERRE LEVEGH - CIRCUIT DE LA SARTHE 1955