Ok, imagine your walking in a thick jungle in the early earth…
You turn a corner and in a clearing, you hear something, and see this!
What are you going to do? Should you run? Hold your ground? Act big and try and scare it? Will it try and eat you?
You just don’t know do you? That’s the point, we do not know how these creatures behaved in any degree. All we have are assumptions. They could have been scared-y-cats, scavengers, giant melon eaters, who knows!
Can you tell how a creature behaved and what it ate from a skeleton?
What if T-Rex Acted like this?!