Steve stands up so fast in response to the 'consequence' - yeah, sure, that's one word for it - that he knocks the chair over and literally flips the table, winding up pretty effectively beside Zerxus.

And the sink.

His reflex is absolutely, 100%, to grab and fling the pan closest to his hand, straight at whatever was coming through the door, before he even registered who or what.

"Hey!"

Whether that's at Zerxus to get him to shut up, outrage at Zerxus' condition, or just pure adrenaline....

It's all of them.