How's it hummin'?

Starscream in TF: Exodus when he first meets Megatron in person:

• “You cannot threaten me, Megatron,” Starscream said.

and a few moments later:

• Megatron faced up to Starscream. They locked optics, neither backing down, but Starscream knew this was pure bravado on Megatron’s part. Still, he played along with the necessary charade.

Starscream in TFP = Mr Flinchy the Flinching Robot