In this scene, the children are in the inventing room and Violet turns into a giant blueberry which alerts the Oompa-Loompa's to their presence. An aerial chase scene ensues!
This is the Taffy Tongue Tunnel. In this scene, the children enter the factory by walking a path that leads to a gaping mouth door lined with taffy! Sugary pink fumes spew out of this doorway mmm