Two Rivers Isle One extra lesson

Vass growled a little louder this time, voicing his displeasure at Burke's rough words - they didn't hurt, they just pissed him off. Of COURSE he had a brain! His frustration affected his answer - he opened his mouth to respond "dodge it" but then Burke cut him off - well heck. He paused, frowning and furrowing his brow, thinking before asking a question in return.

                   "Who's bigger? Cause if its me, I can rear up and crash down with my weight - but if he's bigger...."

Stumped, Vassago gave up and looked to his father for the answer - what WAS he supposed to do?