Strange Behavior.

[CarissaREVV]

Hello,
Name is carissa, I have a bearded dragon his name is Flambo we got him in Febuary. He is decent size gets feed every day and gets water everyday to everyother day. Okay so to the point the other day i looked into his cage and he was out of water he had a little in there in the morning before i went to work so i decided to wait to fill it until after work any how after i filled his bowl i put my finger in the water to get a water drop and i dropped it on the tip of his nose so he would know there was water he all of the sudden stood up almost on to his toes and flattened out his belly he didnt tried to bight me acutally he licked the water off of my finger so i kept giving him water drops for a few seconds then i just wiggled by finger in the water to give it motion so he would come drink and the whole time he drank he stood up really tall with is stomach flatttend out and after he walked away he went back down to normal size. i put another drop on his mouth and he instantly stood up again like he was before. but if i started to pet him he would go back to normal. now i havent seen him do it since then so my question is why is he doing that, is it a sign off aggresion or stress or just an odd random behavior, once i get home i wil upload the picture i got of it. but i am just curious i want to be sure that he is okay.