While his mother is sleeping, Hippety Hopper sneaks away from home at the zoo and hops around town. At the same time, Sylvester is fishing for mice, but finds the mice in the hole to small for his liking and hopes for something bigger. When Hopper comes around to Sylvester's house, the cat inadvertently reels him in and mistakes him for a king-sized mouse. Feeling this is more than he bargained for, Sylvester freaks and run out of the house. Unfortunately, when the outside dog hears that a cat was scared of a mouse, Sylvester finds himself being forced to face the 'giant mouse'.
- Impairment Shot: When the bulldog puts glasses on Sylvester, a shot from Sylvester's point of view shows the dog heavily distorted.
- No More for Me: After seeing Hopper and his mother, the bulldog tells Sylvester that "its time to get on the water wagon", which means getting sober (the opposite of Off the Wagon). However, he takes it literally and gets on an actual water wagon.
- Screw This, I'm Outta Here!: After mistaking Hippety and his mother for a giant two-headed mouse, the bulldog packs his bags, including his doghouse before he and Sylvester leave on a water truck.
- Unknown Rival: Hopper has no idea Sylvester is trying to kill him; he just thinks the pussycat wants to play.