History: Back when being buried alive was a legitimate fear

'Reports of my death are greatly exaggerated', greatly...
Ryan reynolds in Buried Alive

Taphephobia, or the abnormal fear of being buried alive, seems like a pretty valid concern.

I mean, we’re not talking a phobia of clowns or someone accidentally brushing your arm on public transport; this is waking up six feet under. Surely it would be abnormal not to be terrified?