When Bugs Bunny jumps into the water, he is wearing a balloon float device. When Bugs dresses as a mermaid, the strap of the float balloons are still across his chest and under his arms with the balloons behind him. But when the dog get to in front of Bugs, the balloons are suddenly on Bug's chest mimicking breasts. The dog dances about, then leans over to kiss Bugs. Even more suddenly than before, the strap of the balloons are across Bug's chest and under his arms again, with the balloons on either side. Bugs never actually switches the balloons from behind him to his chest, and back again. They just change in a flash, from frame to frame.
After Bugs tells the dog he will hunt for a rabbit for the dog's sandwich, the dog realizes he has been tricked again, and races to catch up to Bugs. Meanwhile, Bugs has been skipping along flat ground. When the dog catches up to Bugs, he gets in front of Bugs and backs him up against an embankment. But when Bugs had been skipping along, it was all flat ground and there had been no such embankment that Bugs had passed.
After first encountering Bugs, the dog asks if Bugs has seen a little gray rabbit. After Bugs contemplates for a few seconds, the view shifts to a wide shot, and suddenly there is a hole in the ground when it wasn't there before. The characters have also shifted position relative to the tree. Before Bugs' close-up, he and the dog are directly in front of the tree, with Bugs slightly to the right. After the close-up, Bugs is to the left of the tree, and the dog to his left, with the new hole between them.
When Bugs Bunny and the dog are under water they keep passing by the same background and the same large seashell.