Spike stitch: single crochet placed 2 or more rows below your working row and drawn up to the height of a standard sc. A would be a spike stitch worked 2 rows below, and a would be one worked into the row down from your working row.
Crochet Corner to Corner Afghan Tutorial FINALLY! I've been trying to figure out how my grandmother made a recently found afghan (she died MANY years ago) and this is it! I had been going crazy about this!