Doc shows Marty McFly (out of frame) the newspaper with the EMMETT BROWN COMMITTED front page news story.

Mental Ward B was a mental ward in the Hill Valley Hospital.

On May 23, 1983 in the alternate history/Biffhorrific history, Emmett Brown was declared legally insane and was sent to the mental ward at the hospital.

In an issue of the Hill Valley Telegraph, he was seen outside the ward, restrained by orderlies, wearing a straitjacket.