The comedian

Uncle Toban does stand-up comedy. Looks like Cooper may be following his footsteps.

Here, he plays the straight man, using physical humor and a dead pan delivery to get a laugh.

And here, the more traditional joke rendition:

(I promise, if he does become a comedian, I won't be a stage mom who stands in the back to make sure everyone's laughing at her shining star. But since it's sometimes hard to understand a toddler unless you are proficient in 2-year-old speak, let me clarify that the punch line is (supposed to be) "Don't cry. It's only a joke!")