thun·der·bolt 
(thŭndər-bōlt′)
(thŭndər-bōlt′)n.
1. A discharge of lightning accompanied by thunder.
2. A flash of lightning conceived as a bolt or dart hurled from the heavens.
3. A startling, forceful action: "Every political campaign manager saves a thunderbolt for the last week before Election Day" (Art Buchwald).