The CEO of Tesla, Elon Musk is often known for his eccentric tweets, memes, and GiFs. This time Amazon CEO Jeff Bezos found himself at the receiving end of Musk's tweet. Just a day back Bezos posted the first look of his Lunar Lander called Blue Moon. Musk posted a photoshopped pic of the vehicle with a quirky catch, and instead of Blue Moon, he called it Blue balls. He captioned it 'oh, stop teasing, Jeff.'