The Lord's Supper: Transubstantiation?

In this episode of Truthspresso Express I analyze arguments for the Roman Catholic dogma of transubstantiation while driving to work in the morning and from work in the evening.

Does John 6 teach the we must literally eat Christ's flesh and drink His blood?

Is a metaphor a "literal" understanding of "This is My body"?

This episode is inspired by the recent episode of Theology Throw Down in the Christian Podcast Community.