Blackwater Islands Night by night

Tulok preferred these times with his brother, rather than worrying about what he might do or lecturing him on his decisions. When they were sparring, everything was just easier. 

So when Alduin showed up on his patrol with that look in his eyes, Tulok met him with a vicious grin. His sibling lunged for his legs but the speaker moved at the last second, jumping up to grab at Alduin's scruff before his brother's teeth could make contact with him. If he was successful, he would throw his weight into Alduin to try and knock him over.