In a sneaky bit of cross-promotion, Dwayne “The Rock” Johnson offered DC Comics fans a tiny glimpse of his Black Adam costume while promoting his new energy drink on Instagram. In the photos, The Rock can be seen staring intently at his computer while cans of ZOA are conveniently placed in the foreground on his desk. At first glance, the photos might not look like much, but at the end of a lengthy caption about aluminum can supplies and how The Rock’s new brand of energy drink will be the “hardest workers on the block,” the super-jacked entrepreneur revealed that the pics are hiding a secret for anyone who read all the way to the bottom: