Creating an autobiographical vignette

This is the first in a series of short writing prompts inspired by Stephen King's "On Writing":

Stephen King remembers and presents his childhood as a series of snapshots. A specific experience you relate about your life, a snapshot, is called an autobiographical vignette. Pick an event from your growing-up years—standing up to a bully, your first kiss, the time you wet your pants at school, a visit to a relative who inspired you to love reading—and write it up. It can be happy, sad or both. Writing about ourselves is  a great experience because, so long as we are willing to mine our memories, this is material we know well. Write enough autobiographical vignettes and you're on your way to having written an autobiography.