John 6:51: eating the bread of life.

I am the living bread that came down from heaven. Whoever eats this bread will live forever. This bread is my flesh, which I will give for the life of the world.

Here is the start of those cannibalism rumors. Jesus will surely give up his 'flesh' for the life of the world, but eating his flesh does not refer to the eucharist, but is hyperbole referring to accepting completely the gift that the Savior brings us.