He may be known for the Virgule, but the feeling of his new exhibition more closely resembles an exclamation mark.
His beard was long, and his forehead dabbed with an exclamation mark of red paint.
In the Folios the interrogation mark and the exclamation mark are often interchanged.
A punctuation mark (!) used after an abrupt and emphatic statement or after a command: “‘Help!’ he cried, as his boat floated toward the edge of Niagara Falls.”