Minecraft wiki entry for Death_messages, associated text: <player> was squashed by a falling anvil
Appears when the player is killed by an anvil falling on their head.
<player> was squashed by a falling anvil whilst fighting <player/mob>
Appears when the player is hurt by a player or mob then killed by a falling anvil.
<player> was squashed by a falling block
Appears when the player is killed by a falling block (other than an anvil) modified to inflict damage.
<player> was squashed by a falling block whilst fighting <player/mob>
Appears when the player is hurt by a player or mob then killed by a falling block modified to inflict damage.
<player> was skewered by a falling stalactite
Appears when the player is killed by a falling pointed dripstone.
<player> was skewered by a falling stalactite whilst fighting <player/mob>
Appears when the player is hurt by a player or mob and then killed by a falling pointed dripstone.