Elon Musk is taking a trip to space down memory lane.

In a new biography on the SpaceX founder, Elon reflected on his yearlong on-again, off-again romance with Amber Heard.

But that's not all, as biographer Walter Isaacson also revealed that the Aquaman actress once spent "two months designing and commissioning a head-to-toe costume so she could role-play" after he told her that she reminded him of his favorite video game character, Mercy from Overwatch.