The Jet Cage

The Jet Cage is a 1962 Looney Tunes short directed by Friz Freleng. In this short, Tweety obtains a jet-propelled cage to fly around outside, but Sylvester wants to eat Tweety even if the cage will prevent him from doing so.

Why It's Infamous?
The short starts to see the downfall of the original Looney Tunes, as gags starts to become more tired and animation starts to become more weaker, due to the rise of Television. (Even though it was still Black & White)

Milt Franklyn died of a heart attack while composing the music score. And as a result, the rest of the series' run from when Sylvester tries to catch Tweety via a net to the end of "Injun Trouble" in had to be scored by William Lava. William Lava's score is ill-fitting, atonal, and shows very little to no attempt to imitate Franklyn's music.

Unlike most of the other Sylvester and Tweety shorts, Granny is heavily underused and does not even manage to catch Sylvester eating Tweety.

In addition, Tweety serves very little purpose than as a plot device.