With thousands upon thousands lining the streets, Rice and manager David Moyes were among those to lap up the reaction.
An Instagram live stream posted by Emerson also showed team-mates and fans playfully ganging up on their midfield leader with a chant about his possible transfer exit.
In unison, they sang: “One more year, one more year, Declan Rice. One more year, one more year, I pray. One more year, one more year, Declan Rice. Playing football the West Ham way.”
However, despite all that Arsenal remain favourites to sign him with interest from Manchester United and Bayern.