With a bobble, you're increasing in one stitch, then turning the work and purling those stitches only. Then depending on the bobble, you either turn and work these stitches together to get back to the original one, or you work it again.
Popcorn stitch involves passing stitches over--not exactly the same as a bobble.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry