After finding a quiet spot under a tree, you lean against it and drift off to sleep...
***
You are awakened by your head hitting something. Looking up, you see it was a large branch. The strange thing is, it was a few feet above your head when you went to sleep. In fact the tree itself seems to be leaning a bit now. You quickly figure out why - you've grown in your sleep!
Suddenly you sneeze, and shoot up a foot or so taller.