1. Scar doesn't give a shit about the potentially toxic gases spraying him in the face.
2. The hyenas like to dive into a pool of their prey's skeletal remains, and wear their skulls as hats... and they laugh about it.
3. Scar doesn't do subtlety. He flat out tells everyone, in the most gleeful manner, that he's going to KILL HIS BROTHER AND HIS NEPHEW.
And the hyenas react to Scar's dastardly plan by celebrating. That is some fucked up shit.
4. Also, Banzai falls square on his ass onto a pile of ribs and no one seems to care.
5. Scar turns into Adolf Hitler.
That's Hitler on the right in the Nazi propaganda film Triumph of the Will. It's horrifying.