His widow later sent The Goodies a letter thanking them for making Mitchell's final moments of life so pleasant.[19][20][21][22] Diagnosis of his granddaughter in 2012 of having the inheritable long QT syndrome (a heart rhythm abnormality) suggests that Mitchell may have died of a cardiac arrest caused by the same condition.[23] In 1989, during the initial run of the film A Fish Called Wanda, a 56-year-old Danish audiologist named Ole Bentzen reportedly laughed himself to death.[24][25]