Pretty sure this door opening is impossible in the real physical world... unless they can somehow phase out of normal space-time like in this photo I don't think you'll be opening both Model X's doors even in a normal parking spot since the door would be something like a full foot past the other Model X's door. One at a time, sure, but not at the same time. No way. Not when parked next to each other, even normally. Would need more than a normal amount of space for this.