Tweety's Circus is a 1955 Warner Bros. Merrie Melodies cartoon short directed by Friz Freleng.
[3] The story centers on Sylvester visiting a circus, where he not only tries to catch Tweety for his meal, but attempts to one-up a lion (an attraction billed as "King of the Cats").
There, upon seeing the lion exhibit, the unimpressed cat immediately expresses his displeasure over the large feline's billing.
Other run-ins with the lion, elephant and other animals, all ending with Sylvester getting the worst of things, involve him exploiting his abilities as a high diver (Tweety directs the elephant to "drink it all down" (referring to the water before Sylvester lands), a fire eater (the lion makes Sylvester eat the fire) and a high-wire walker ("hewwooooo, puddy tat!").
A loud roar erupts, and with Sylvester presumably having met his death, Tweety changes his spiel: "Step wight up!