His eyes immediately narrow as Edward says 'toss that knife here.' What, like he was born yesterday? They're in a strange new place under strange new circumstances, he's not going to toss that knife over! Also, it's his knife! He's keeping it!

"Search for what? People who aren't here? You can waste your time doing that all you want. I'm focusing on the here and now."

Which would be a much more impressive statement if the here and now wasn't robbing corpses.