Bugs Bunny's eyelashes briefly disappear and reappear while covering his bra with his left hand and trying to use his bra to tie up Porky and his hunting dog.
In Tales From The Vienna Woods, when Porky makes his appearance he is hunting with a blunderbuss (a firearm with a funnel shaped mussel and shoots shot). But after Porky and his dog confront Bugs Bunny in the bush and jump out, Porky reappears with a conventional straight barrel rifle.
The exact same branch is shown on both occasions when Mama Goose holds it up for her brood to pass underneath, even though the surrounding scenery is different.