Starscream, in his 'delicate' state, is more prone to interpret it as anger. He holds his hands up and open defensively (as much as he can with the restriction of the cuffs, anyway), flinching a bit.

"Well you asked. Honest to Primus, that's my honest interpretation of the facts, take them or leave them. If I knew what he had been up to in the fight before hand that may have caused such a reaction, I might be able to interpret for your further, but as things are right now that is not knowledge that I have access to."