was on House once.

but sometimes it's better to double check your work.

Seems sort of a bad classification job.

"Qualifications for coroners are set by individual states and counties in the U.S. and vary widely. In many jurisdictions, little or no training is required, even though a coroner may overrule a forensic pathologist in naming a cause of death. A coroner may be elected or appointed. Some coroners hold office by virtue of holding another office: in Nebraska, the county district attorney is the coroner; in many counties in Texas, the Justice of the Peace may be in charge of death investigation; in other places, the sheriff is the coroner."

http://en.wikipedia.org/wiki/Coroner

old carpentry axiom

holding a wake service: sometimes folks would wake up.

saved by the bell: a bell was put into the casket, if you woke up and rang the bell
they dug you back up.

I am sure there are more, but those are the 2 I know of.

There are a lot of similar folk etymologies that are not true. At the moment, I can't think of a single one that IS true.