A gift for the 'slender man' was uploaded by CaughtNotSleeping on June 3rd, 2011. It is 1:52 minutes long.
Caught, having researched the Slender man myth response to comments on his video referring to the popular "20 Dollarz" meme. He returns to the alley from STOP to leave a twenty dollar bill and to discourage further discussion of the Slender man.
The Twenty Dollarz Meme
On September 30th 2009, a parody video of Marble Hornets was uploaded by YouTube user brett824. The video poked fun at the frequent 'Missing Audio' files present in the Marble Hornets videos. It overlaid Entry #6 with Rob Browz's "Gimmie 20$ Dollaz" whenever Slender man appeared on screen. It grew into a larger troll-theory/meme regarding Slender man's true motivation for stalking people.
Though unconfirmed, it is possible that Caught is showing an early level of fan interaction here, as he reacts to this meme only after it is called out by several other YouTube users in his video comments, though he does not cite any specific users who encouraged him to do so.