The four ultra-nerds from The Big Bang Theory wish they were superheroes, and sometimes wishes come true, at least on this funny Big Bang Theory t shirt! The Big Bang Theory Comic Heroes T Shirt is black and features Sheldon's catchphrase "Bazinga!" in big green letters at the top. Sheldon, Leonard, Howard and Raj stand below, dressed as superheroes, atop the atomic symbol that also serves as a logo for the TV sitcom. What's that green radioactive glow, guys?