As the crystal ball rolls on the floor after Bogel and Weerd accidentally dropping it, Vincent's clothes are normal when they should still be stone.
On the Fly-By-Nite Airlines sign it reads underneath: "Dedicated to all the late night passengers who chose to go Fly-By-Nite", but Shaggy says "Dedicated to all those late night passengers who have flown Fly-By-Nite".