The last shot is a reference to the "Ghostbusters" (1984) scene in which Rick Moranis is chased and attacked by a demon dog that turns him into The Keymaster. Dong's clothing is identical to Moranis', he stumbles up to the glass and knocks over a chair in the exact same way, and even the sound effect when he slides down the glass is identical to the original scene.
Dong wears Ross (FRIENDS) outfit.