I just know, I feel it in my bones, that if Henry didn't stop Joel, he would've pulled Ellie off the floor and right into his arms. You can see it in his eyes - it's like for a moment, even with all that just happened, all he sees is Ellie, his Ellie and she's scared, probably hurt and she's crying and all he wants to do is gather her in his arms and make sure she's okay. And if that happened, Ellie would've broken down right then and there and just clung to Joel with all she has left in her.