My friend had Pneumonoultramicroscopicsilicovolcanoconiosis once, it quickly turned into Supercalifragilisticexpialludotiousitis; I really felt bad for him when it went to Justinbeeberizgheyotosis.
Because Bellatrix only went to beaches with the very finest of sand, she contracted Pneumonoultramicroscopicsilicovolcanoconiosis, for only inhaltation of fine sands can cause the disease.