Matrix Revolutions, The Easter Egg - Original Matrix Reference

At approximately 10:18 in the movie, Morpheus, Trinity, and Seraph enter a train and see the Trainman. At 10:43, the Trainman runs out of the train. There is an advertisement on the wall outside the train for "Tastee Wheat". This is an egg referring to a part in the original Matrix where Mouse is talking to Neo about Tastee Wheat.