Funny how all drawn images of T-Rex show them with a menacing appearance, which is unlike every other known species in the animal kingdom.
That's a good point. Other ferocious animals like lions and wolves usually look chill most of the time when they aren't on the attack. You don't see chill depictions of the t-rex, do you.
And crocodiles. Look how docile crocodiles act, even when hunting. Mother crocs are always gentile and loving towards her brood. T-Rex? Nope. Always a monster.