T-Rex: Bigfoot! He's a hairy protohuman who lives in the woods and is bad at being in well-composed, visually competent photos.

T-Rex: Or is he instead really just totally fake OH SNAP TWIST!!

T-Rex: If Bigfoot is real, we can expect to find Bigfoot droppings in the woods. However, as he is basically a human dude, these poos would be virtually indistinguishable from a human dude's poops! And as nobody wants to touch a human dude's raw nasty poops, no actual research into this area has ever been done.
Dromiceiomimus: Or is ever likely to be done!
T-Rex: I know, right? Poop's so gross, can we all just agree on that right now?

Utahraptor: If Bigfoot's fake, how do you explain... THIS!
T-Rex: ...Explain what?

Utahraptor: My empty hands. As you can see by their positioning, I was about to bite into a large watermelon but Bigfoot stole it, leaving them sadly empty.
T-Rex: Pfft. Come on! If that were true, why'd he stop there? Why wouldn't he steal the two churros per hand that I'VE been carrying around with me all da-

T-Rex: OH CRAP BIGFOOT IS REAL
T-Rex: AND HE HAS NO CONCEPT OF PERSONAL PROPERTY TOO, THAT'S WEAK