Seth regrets asking pretty much immediately. He bites his lip and tries to come up with something comforting or motivational to say, or something to lighten the mood that won't seem terribly crass, but he comes up short. He wants to reach out and pat Daniel's shoulder or something, but it would be awkward across the table, and probably awkward in general, so all he can do is feel bad for asking.

"Sorry, man..." he says quietly, and means it. Must've been shit for everyone involved, not knowing if he'd come back or not, and he can't even imagine being the one to go through with all the dying.