Director Benny Safdie aimed for authenticity in the film The Smashing Machine by avoiding rehearsed or choreographed training scenes. Instead, he captured real coaching live on set.
Bas Rutten, UFC Hall of Famer who trained Mark Kerr in the late 1990s, appears as himself. The on-screen moments are genuine, not traditional acting; Rutten actually instructs Dwayne “The Rock” Johnson during filming.
The idea came from conversations between Rutten and Safdie. In an interview with LowKick MMA’s Tim Wheaton, Rutten explained Safdie's direction:
“Of course, there was a script, but Benny said, ‘Dude, it’s you.’ So, just follow the guidelines, but make it your own. Do what you would do.”
Rutten chose to forgo rehearsals, believing that real teaching would appear more credible than staged instruction. When filming sequences of Kerr learning techniques, Rutten proposed skipping any rehearsal:
“So if we want to go over some techniques that I was going to teach him, I said, ‘Let’s not.’”
This process solidified The Smashing Machine as a realistic portrayal of martial arts training.
Bas Rutten's real-time coaching of Dwayne Johnson, without rehearsals, brought unmatched authenticity to The Smashing Machine, setting it apart from typical staged fight films.