The last five minutes of this insane Three Stooges story almost puts me in tears laughing, and I've seen it many times. It features Curly as a pro wrestler! Regarding those last few minutes, it's one of those "you have to see it, to believe it" cases. I've never seen Curly go this berserk before, which is saying a lot.
Actually, this Three Stooges classic isn't just pure lunacy at the end: it's crazy and funny from start-to-finish, with a great 1930s look and feel to it. From the opening bums-in-the-railroad car scene, to knocking over a woman's baby carriage to the boxing gym scenes, on and on it goes until the incredibly wild finish.
Included in this story was a theme - used in several Three Stooges films - in which Curly would go bananas by smelling something, or hearing something.....and then he would be unstoppable. This worked to great advantage in the ring, whether it was boxing or wrestling or whatever. In this story, he becomes a wrestler, only "out of soy-cumstance." The real wrestler, a bearded Russian-looking guy named "Bostoff," gets blitzed with a combination of alcoholic drinks and Curly - to save the Stooges butts from the mob boys who have bet on Bostoff - has to take his place.
What happens just kills me. As other reviewers here state, this is a classic Three Stooges, one of the best.