It was Luol Deng 3pt buzzer beater at the end of 1q against Brooklyn Nets. And Heat won by 4, although if not that 3pter - Nets could've had 1pt lead with less than 20 seconds to the end of the game
Guess you mean this: <iframe class="vine-embed" src="https://vine.co/v/Og1exbmUM3T/embed/simple" width="600" height="600" frameborder="0"></iframe><script async src="//platform.vine.co/static/scripts/embed.js" charset="utf-8"></script> 6 steps and a carry.
This. I can't really explain how Harden does it so I say grey area. The coordination to do this and have it come so natural to Harden is ridiculous.