Lol thats funny with the drop of water! It could be a few things but those dots usually a sign of stress or uneasiness. My guy did it at first when he was getting used to making the long journey from his cage out on to a vine and to his free-range set up. The branch that takes him to the playground is about thirty inches long and i think he was nervous because he was on the limb and exposed in between the cage and free range plants. He didn't have any cover on the limb and basically had nowhere to go in case of danger while he was on his way. This is what I summed it up for, but after a few trips he lost the dots and just cruised through. Lol i guess what im trying to say is that yes he does look a stressed. He may want some more plants up towards the top maybe, or maybe that new plant is still got him uneasy since he is not used to it. In that case its expected and should get used to it rather quickly. Sometimes you have to make adjustments until he finds his comfort zone, More plants, less plants, plants up higher, plants down lower, or even different plants can be tried. I also noticed that red bulb is that what you use for his basking lamp or do u have that, plus the uvb tube plus another basking lamp? If so he may be a little warm, but i dont want to insult you by assuming you dont know your temps, but just a thought?