Samuel L. Jackson had just undergone treatment for drug addiction, and had only two weeks from his discharge from rehab to the start of filming. Jackson has gone on record as saying that Gator's ravaged look was not make-up, but actually the result of Jackson's own detoxification.
The Cannes Film Festival introduced the Best Supporting Actor Award specifically to honor Samuel L. Jackson. Previous honorees in the same category are Jack Thompson in Breaker Morant (1980) and Sir Ian Holm in Chariots of Fire (1981).