...1966's The Brave And The Bold #64,
the first of the regular Batman team-up issues.
Script: Bob Haney
Art: Wim Mortimer
This may be the most entertaining Batman story I've ever read. There's not a page that goes by without at least one genuine "What the f@ck?" moment, and several have multiple incidents that make you wonder what the hell was Bob Haney on, anyway?
Via Kevin Church.
