Let me play the lion too: I will roar, that I will do any man’s heart good to hear me; I will roar, that I will make the duke say "Let him roar again, let him roar again."

– William Shakespeare

A Midsummer Night’s Dream, Act 1, Scene 2. An over-zealous Bottom, the man who wants to perform all the parts in the Mechanicals’ play, offers to play the lion. Bottom tends to have a very inflated opinion of his own acting abilities.