Sometimes a literal visualization of a message is the most effective one. These billboards by creative agency Extra Credit Projects in Grand Rapid, Michigan, promote the services of Mary Free Bed Rehabilitation Hospital, an 80-bed rehab center in Grand Rapids. On the all-text billboard ads, the ailment to be treated is clear; nothing more need be said or shown to improve understanding.
As an aside, the name of the hospital itself has a fascinating origin. In 1891, a group of women in Grand Rapids sought to provide medical care for people with limited financial means by asking everyone named Mary, as well as those who knew anyone named Mary, to donate money to secure a free bed in one of the local hospitals. The so-called Mary Free Bed Guild went on to raise funds for convalescent and orthopedic centers for disabled children. In 1966, the program, expanded to care for spinal injury and stroke adult patients, was renamed Mary Free Bed Rehabilitation Hospital.