[Legitimately stunned, not that he'd be sad because of course he would be, but by the force of the reaction]
[He stays still for half a moment before he's tightening his arms around him and just holds him - not able to say anything. Because what could he possibly say. And just wishing he could do something to make it better for him.]
[But knows it's important that he does let it out, so he doesn't protest even if it breaks his heart - just holds him.]