Questions about "I am the Bread"

Sunday 14th 6.30 St Marks - I have been asked to speak on John 6.

This questions I will address (not necessarily answer) will include:-

Why is the feeding of the 5000 a big deal – all four gospels?

Why did Jesus walk on water?

What did he not say when he said “I am the bread of life”?

How can we eat the flesh of the Son of Man?

Is there an Old Testament passage that helps get it?

      Is this just Bob’s fixation with Isaiah or was it really in Jesus’ mind?