Finn's smile widened a little bit, allowing himself to relax. After sighing a bit, he crawled back into bed and faced Poe that way. The other looked so happy. He didn't want to leave this bubble yet. "Don't need the whole galaxy. I've got you."

But his worry wouldn't really abate, so his smile turned into a concerned frown pretty fast. "Do you think it was the force?"

If Poe was force sensitive, he was very strong in it. It's entirely possible Poe knew of this power and kept it secret for obvious reasons. Regardless, it was manifesting outside his control (at least until he was aware of it). This could be dangerous.

Not to mention the other side of the force. He was already a little worried about the way Rey could cling to her anger. He didn't need to worry about Poe slipping just a little too far, too.