[1] Wacker was involved in a fatal accident during the second lap of the 1952 Watkins Glen Grand Prix, which at the time was a street course.

While preparing for a right hand turn, his Allard J2 came dangerously close to a Cunningham driven by John Fitch, and both drivers swerved to avoid a collision.

The back end of the Allard came out slightly to the left and closer to a throng of spectators sitting on the curb along the side of the course.

The tragedy caused the end of street racing at the Glen and elsewhere in the United States.

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