Bart Busschots starts this week's episode with a great refresher on what a callback actually is (because I have remained mystified by the term). He starts with simple examples and then shows us how we've been using callbacks all along and just didn't realize it. Then he'll walk through the challenge solution and the extra credit. He shows us how there's two paths to "callback hell", one through nested AJAX calls in parallel, and one with them in series (which sounds worse than it actually is. The challenge for next week is super open-ended which terrifies me but I'm sure it will be fun.