This story is a sequel to the Disney cartoon "The Three Caballeros" (1944), without being one because Don Rosa just wanted to include José Carioca and Panchito Pistoles in a story because he liked the cartoon (it is the only one he likes!). But he uses some arto of this cartoon in his panels :
First, this panel in which Panchito shoots anywhere reminds me a scene from the film in which he does this too :
" Brighting as a Peso ..."
This panel is like a reunion of those two scenes, except that José draws the silhouette of the Señorita instead of Panchito :
... and the fight !
And finally, the final scene with Señor Martinez (the horse's name) . In the cartoon, they also ride a kind of horse (in the kind of nightmare Donalds have in the end of the cartoon) but it would rather be a female. Moreover, it has real female human legs !