After a two-week winter break, one of my eighth grade advisees returned to school and demonstrated his newfound skill of juggling. He was able to juggle with four balls, go behind his back, and under and through his legs. Quite simply, his demonstration was remarkable and earned the praise of his peers and advisor. We were all curious to learn how he had acquired this skill in such a short span of time, because we recalled that before the break, he was struggling to get even three balls going.
He replied, "I found this great guy on YouTube, and I watched a lot of YouTube over break."
In other words, he was self-taught. He had an interest and a passion, and he put in the time and commitment to master a skill.