Rare appearance of Morty and Ferdy, Mickey's nephews who mostly appeared in comic strips.
Donald is the only one not wearing a costume (unless his costume is "sailor").
Mickey begins his story by stepping in front of a curtain and warning his audience of how scary it is. This is a reference to the original film version of Frankenstein (1931) starring Boris Karloff, which began with a similar warning.
When Mickey says he doesn't want to "toot his own horn," a steamboat out the window toots its horn. This is the steamboat from Mickey's debut short, Steamboat Willie (1928).'