In Act I of Julius Caesar, what incident does Casca describe to Cassius and Brutus, and what is Casca’s attitude toward the incident?

It is the feast of Lupercal, a celebration of fertility in Ancient Rome, and Mark Antony won a laurel crown in the annual foot race.  Casca witnesses Mark Antony attempting to offer the crown to Julius Caesar, indicating that he should be crowned king.  Caesar, knowing that the people do not wish to have a monarchy, refuses to accept the crown from Antony, yet Casca tells Cassius and Brutus that he was sure that Caesar really wanted it.  Three times Antony offered the crown, and three times Caesar refused, each time, according to Casca, less enthusiastically than the time before.  It is Cassius' and Casca's belief that Caesar wants to make himself king of Rome.  Caasca's report is filled with sarcasm and loathing.