He did stunts from 1962-1967, for a total of 5 years.
In 1965, Bill Cummings played Quist in the movie Thunderball. The stuntman was paid $450 to jump into the shark pool. Due to the dangers on the set, Cummings demanded an extra fee £250 to double for Emilio Largo's sidekick Quist as he was dropped into the pool of sharks.
When he wasn't performing stunts, he ran a greengrocer's store in Walton-on-Thames, Surrey, England.
Bill Cummings died in 2002.