It's been long enough since he's ran into the other that for a moment he's not quite sure how to handle himself. Eridan's sarcasm is familiar, but Jack's never been good with subtle emotions even at the best of times. He can't quite tell whether everything is really as fine as Eridan's trying to make it seem or not.

He's quiet for a moment, and still, and it's awkward for him, considering how he's normally smiling and vibrant and moving, but he needs to get it out, if only for his own conscience. "...I looked for you," he said, without really supplying any more context to the comment than that.