:lol: This plz account of a dancing stickman was made by <BrotherlyFluff (https://www.deviantart.com/brotherlyfluff) and the transparency was added by :icondarioart:. :)
Plz accounts are accounts that are usually inactive and that are only used for their avatars. They have the same purpose as emoticons and their usernames usually end with "plz", which means "please". Any deviantART member can post plz avatars in comments, forums, etc.
To post an avatar in a comment, put a colon, write the word icon, write the username, and then put another colon. Even if the username has capital letters, capitalization is not required in this type of coding. This plz account's username is Stickm