A Mickey Mouse skeleton gag? Not at all.
This is one of the ersatz New York City studio Mickeys, in this case from the Bimbo cartoon “The Bum Bandit” (1931), with the animation credits going to Willard Bowsky and Al Eugster. Eugster later wound up at the Disney studio.
As usual with an early Fleischer sound cartoon, there are lots of fun little bits, including talking guns, a complaining bird and cow and a dog-eared Betty Boop walking on people’s heads.