It's a blog! Mainly of book reviews.
Gawain flinches before the expected blow; the Green Knight taunts him, saying that he did not flinch in King Arthur's house. Gawain points out that there's a slight difference - Gawain can't stick his own head back on if it is removed!
This scene racks up the tension - what's going to happen? Will the girdle work? Previous poems in the manuscript the poet's genius for imagery but this shows his genius for narrative.
We are getting right down to the crux of the plot, now. If you don't know the story and don't want it spoiled, you should probably not read any further updates.