We had a pretty good storm last night and my fish were slower to feed this morning. One of my large Tilapia jumped ship. It was still breathing and I impulsively put it back into the tank. I wish I had put it my aquarium for observation)
I've always put my jumpers back in the main tank and have never had a problem. It might be a better choice to isolate the the adventurous fish, but I think you can rest easy.
Was the skin rough? I put one back in once, she seemed okay swan well even, but the skin was rough (dried out), she never got over it and died several days later.
Keep your eye peeled...