Optimus: So... what are you doing?

Megatron: Oh... you know, just walking around.

Optimus: Walking around?

Megatron: Walking around.

Optimus: Plotting to destroy humanity?

Megatron: Plotting to destroy humanity?!

Optimus: Are you?

Megatron: No!

Optimus: Good, because that would be bad.

Megatron: How bad?

Optimus: I would have to kill you.

Megatron: That's bad.

Optimus: Indeed

Source: Dragon Ball Z abridged