Acting
Joe E. Brown's rubber face and yelp — silent star refusing to shut up.
Production
Pre-code freedom means actual boxing violence and barely-there costumes.

Director
Roy Del Ruth
Trivia, insights & behind the scenes
Georges Carpentier was a real world light-heavyweight champion — they cast actual boxing royalty for a two-scene gag.
This was Joe E. Brown's first talkie after his silent career — that manic energy is a man proving sound won't kill him.