Pneumonoultramicroscopicsilicovolcanoconiosophobia
The Phobia of being close to a volcano, silica dust(which you can't see), and getting pneumonoultramicroscopicsilicovolcanoconiosis.
Im going to a volcano.. Someone: NOT THIS CLOSE THOUGH! Me: uhhh... I think you have pneumonoultramicroscopicsilicovolcanoconiosophobia?