Hippety Hopper escapes from a zoo. When Sylvester sees him, he believes that that the kangaroo is actually a king-size mouse. A bulldog tries to convince the cat that there is no such thing, but when he too sees Hippety Hopper and his mother (who was searching for him), he and Sylvester hitch a ride on the Water Wagon.
- The cartoon was reissued in the 1954-55 season (evident from the style opening Color Rings used: red rings with a blue background). Unlike most other reissued Looney Tunes, the original closing sequence was kept. This is one of four pre-1948 Looney Tunes to keep the original closing.
- In 1995, Turner Entertainment restored the original opening and credits for the cartoon's "dubbed version". It was later restored with the original titles when the cartoon was released on DVD on 23 April 2013 on Looney Tunes Super Stars' Sylvester & Hippety Hopper: Marsupial Mayhem.
- The song playing on the opening titles is "You Never Know Where You're Goin' Till You Get There", which had been sung by Sylvester earlier in "Back Alley Oproar". The same song is played on the opening titles of "Hippety Hopper" the following year.
- Coincidentally, all three of the cartoons had their original titles lost due to Blue Ribbon reissues and were later restored with the original titles.
- This marks the debut of Hippety Hopper, who would be Sylvester's main foe in the shorts directed by Robert McKimson.
- This is the only Hippety Hopper cartoon in the a.a.p./Turner package. All the other Hippety Hopper cartoons remained in the post-1948 package, in other words, under WB's ownership.
- Recent airings on Boomerang have the restored version with the original opening, titles, credits and ending.
|← I Taw a Putty Tat||Sylvester Cartoons||Kit for Cat →|