He just made his own death less painful. We should all be so lucky.

In 1900, Charles Justice was a prison inmate at the Ohio State Penitentiary in Columbus. While performing cleaning detail duties in the death chamber, he devised an idea to improve the efficiency of the restraints on the electric chair. Justice designed metal clamps to replace the leather straps, thus allowing for the inmate to be secured more tautly and minimize the problem of burnt flesh. These revisions were incorporated into the chair and Justice was subsequently paroled from prison. Ironically, he was convicted in a robbery/murder and returned to prison 13 years later under a death sentence. On November 9, 1911, he died in the same electric chair that he had helped to improve.
-http://en.wikipedia.org/wiki/Electric_chair