 During filming, Cagney also made "Smart Money", co-starring Edward G. Robinson, who had finished his breakthrough film "Little Caesar".In the scene where Mike Powers punches his brother Tom, Wellman privately took Donald Cook aside and, explaining his desire for authenticity in Tom's reaction, asked the actor to really hit Cagney.Cook played his part a bit too well, and he struck Cagney in the mouth with such force, he actually broke one of Cagney's teeth.