"The whole story happens in reverse and unfolds through a very specific cause-effect lens so we had to make sure that every shot would lead into the next one seamlessly without continuity issues. This was shot in two days and most shots were scheduled out of order for logistical reasons so it was a challenge to keep track of where we were and communicate that to the crew. The explosions are totally practical and executed with fake paint, fake windows, air cannons, and explosives." Alex Acy, director