Jeff Bezos gave a "rambling" intro Thursday to the new moon lander created by his Blue Origin spacecraft company, and one person in particular was paying attention—and poking fun. CNBC reports competitor Elon Musk, CEO of SpaceX, took to Twitter Thursday night and tweeted out a photo of Bezos' "Blue Moon." Except Musk had crudely (both literally and otherwise) altered the photo so that the moon lander had "Blue Balls" imprinted on its side. He added, "Oh stop teasing, Jeff." CNET highlights the rivalry between the two men in their quest to get humans near or on the moon: Musk is hoping to orbit passengers around it by 2023, while Bezos wants an actual lunar landing by 2024. (Read more on Bezos' announcement.)