Cartoon Network's original head programmer, Mike Lazzo, conceived Adult Swim. The block grew out of Cartoon Network's previous attempts at airing content appropriate for teenagers and young adults who might be watching the channel after 11 pm (ET/PT). The network began experimenting with its late night programming by airing anthology shows that presented uncensored classic cartoon shorts, such as "ToonHeads", "The Bob Clampett Show", "The Tex Avery Show", "Late Night Black and White", and "O Canada". Another block, Toonami's "Midnight Run", aired the network's action programming uncut with minimal edits. At that time, one third of Cartoon Network's audience were adults.