Whoa, indeed. Olan'atar apparently appeared right in front of someone on the ship. He almost jumps, only his training barely stopping him, and instinctively takes a menacing stance for a second, before remembering he's on a Federation starship, and therefore there's nothing to fear from people here. He relaxes, realizing he might have scared the poor guy out of his skin, and recognition hits him.

"Adm--" Oh, wait, he's only a Lieutenant Commander. "Commander LaForge?"

He is on the Enterprise. The D.

Founders.