Five-post crochet bobble
Five unfinished US double crochets close together to make a bobble that pops toward the opposite face.
Counted practice swatch
Chain 16; sc in second chain and across (15). On the next row place a bobble at stitch 8 and sc in the other 14.
Work the repeat
For each unfinished dc: yarn over, insert in the same stitch, pull up loop, yarn over and pull through two. Repeat 5 times (6 loops). Yarn over and pull through all loops. Follow with a firm sc in the next stitch.
Read the fabric
Push the bump to the right side. Each bobble consumes one base stitch and makes one top stitch; do not add chains between its posts.