Charlie and the Chocolate Factory Easter Egg - Beetle Juice?

Watch the scene where the group is riding down the chocolate river on the boat. Once the group passes the room titled "Jelly Beans", flick on your slow-motion. The next room cannot be read unless you're at 1/7th time or slower.

It reads: Beetle Juicing, a reference to Beetle Juice, which was also directed by Tim Burton!