Watch the episode on where Mrs. Finster and Hank fall in love, and at the end where they are talking and said, "It's Over." When Hank went to sit down, magically a bench appeared in front of the garbage can, and then when Hank left it goes back to T.J and his friends and it is now far away from the garbage can. And in any other episode when the kids are by the garbage can, there is always a fence behind them.