Hello everyone. A friend of mine asked me about her bearded dragon's odd behavior. I'm a snake person not a lizard person, so I decided to post here. He's in a 50 gallon aquarium on newspaper substrate with temps in normal parameters. Been eating and drinking normally. She says she simply turned on the lamps and he went nuts, running around the tank with his throat puffed and black. Episode lasted about 30 seconds and he returned to normal. Only thing I could of was maybe he saw his reflection or maybe acting territorial? Any info would be appreciated. Thanks