A scene from the Beach Bears saga by  maxgoof. This particular scene is from Chapter 22, where Bobby Thornbody leaves a note for Dipper, who is grounded for...well, you'll have to listen to the story to find out why the yellow bear is in hot water. :)

Wanna hear the Beach Bears story? Wander over yonder and take a listen! http://www.furaffinity.net/view/11432986/
I actually voice one of the characters in the later chapters, a tiger named Susan who gives Dipper a bit of trouble.