... That's different.

Elros throws himself backwards, off his horse (his poor longsuffering horse, who is fortunately used to his rider being An Idiot and pulling stupid stunts, and so just backs away with an upset shake of his head) to avoid the punch, rolling to his feet to face the.... dragon in human form?

"Far be it from me to assume the intelligence or lack thereof in dragons, O Small One! All I care about is that Ancalagon and it's ilk no longer threaten our people."

But you know what, he's going to just roll with it.