Stan Fox's career ending accident at the start of the 1995 Indy 500. I have a framed autographed poster of this car. He lived not far from me, and I watched him race several times on the local short tracks. He died five years later in a head-on collision on a New Zealand highway.
http://racingaccidents.wordpress.com/2008/06/23/1995-indianapolis-500-stan-foxs-horrific-crash/
http://www.flickr.com/photos/milwaukeehockey/9465612877/
Stan wrote "OOOPS" along with his signature on each photo.