After Petunia got startled by Porky's loud "Blue mugs!" statement and spilled her coffee on the counter in the break room, Petunia's cup is now full without any time to fill it up.
Inside the asteroid, when Daffy demonstrates his talent for levers, he pulls the lever to lower the machine and pushes it to make it go up again. Porky also does so later in the scene. But when Porky and Petunia are strapped in, Daffy pushes the lever forward and the machine still lowers them.
The characters jump into a vehicle it has three pedals, meaning it has a manual transmission. To go, someone steps on the gas only, not the clutch, meaning the car would stall.
Despite being a male duck, there are some occasions in the movie where Daffy lays an egg. It is mentioned later in the movie that he can, though it is hard to do.
Baby Porky is learning to ride a bicycle which has no training wheels. When it is baby Daffy's turn, he not only isn't riding a bike, but says "Look, Pa. No training wheels!" as if to suggest that baby Porky's bike has training wheels.
Petunia Pig takes a steaming flavor stick out of the microwave with her bare hand and Daffy Duck puts it in his mouth, with neither of them burning themselves.