LobowolfXXX wrote:"Better safe than sorry" would be a better justification for NOT nailing down the lid, at least back in the day. Inadvertently burying people before they'd died was so commonplace that there were periodicals (such as "The Perils of Premature Burial") devoted to it.
I was thinking more as a precaution against vampirism or zombification rather than the much more rare occurance of catalepsy.