Supergirl #27 (2005)

Written by Kelley Puckett
Art by Rick Leonardi & Dan Green
Cover by Drew Johnson & Ray Snyder
Supergirl thought she triumphed over Reactron, but the radioactive madman has one last trick up his deadly sleeve. Supergirl plunges into a world where up is down, and no, we're not talking about Bizarro World!