Brave and the Bold, The #134

DEMOLISHMENT! Green Lantern defects to a European country and Batman is ordered to retrieve him. Batman is captured and subjected to torture, part of a process called The Demolishment, including spending days in a sensory deprivation tank that had test subject go mad within two days. He survives by repeating the name "Joe Chill" over and over as a mantra to maintain his sanity.   Green Lantern's defection, of course, was a lie to obtain information on the Demolishment technique to train their agents to beat it. Seizing control of his ring, secreted in Vakla's office, Green Lantern escapes with the Batman to safety.