Happy Days star Henry Winkler, who played Arthur "The Fonz" Fonzarelli, and Michael McKean and the late David L Lander, who played Leonard "Lenny" Kosnowski and Andrew "Squiggy" Squiggman on its spin-off, Laverne & Shirley, voice "The Sharks".
Patrick says the line "Life is but a walking shadow". This is a quote from Shakespeare's 'Macbeth'. The full line goes, "Life's but a walking shadow; a poor player, that struts and frets his hour upon the stage, and then is heard no more: it is a tale told by an idiot, full of sound and fury, signifying nothing."