From The Quentin Tarantino Archives

William Clark was assistant director on the following Tarantino-directed films:

• Kill Bill (assistant director)
• Jackie Brown (first assistant director)
• Pulp Fiction (additional second second assistant director)

He played a character called "Soda Jerk" in Kill Bill: Volume 2 (see picture below)

• On Imdb
• Interview on Thestream.tv