Not cool, lion cub.

There is plenty of video proof that some dogs are afraid of cats. Those clips are cute and funny because the conventional wisdom is that dogs shouldn't be afraid of cats. In this case, the dog has every reason to be afraid, because the cat in this scenario is, you know, an apex predator! Even if the lion is still a cub, the dog is smart enough to know this is the kind of cat capable of taking out larger prey than tinfoil balls and shadows.

Sources: Buzzfeed