Blowing out a snot-ball when you're sitting on your board waiting on a wave. Usually by pressing on one side of your nose and blowing mucous directly into the sea, but also by blowing snot into your hand and flinging it away from you.
Brah, my nose started running while I was waiting on that set. Had to do a gnarly surfer honk.
Hanakanjō is a syndrome in which flowers start growing out of the victim's body because of a strong emotion.
Maybe they'll grow when you're happy, feel loved or in peace! In that case (good emotions), the flowers will sprout painlessly.
But maybe they'll grow when you're depressed, anxious or deeply missing someone... In that case (bad emotions), the flowers will sprout with a sharp pain.