If you've been watching pro basketball lately, you've probably seen one of the NBA "Encouragement" promos, in which fans go back in time and tell younger versions of players like Steve Nash, Stephen Curry and Kevin Durant all about their subsequent basketball careers.

In this two-minute video, the technology behind the Steve Nash spot is explained.

Among the behind the scenes secrets include blue screens, real-life recreations with actors, special effects and more.

Check out the video below, and prepare to have your mind blown.