Now you see him. Now you don't. Proving the hand is quicker than the eye.
6 seconds sound clip from The Yogi Bear Show - Duck in Luck (1958) - S01E15 TV Series.
You can hear this line at 00:05:07 in the Blu-ray version of the movie.
Quote context
[...]
- Just sit tight, little duck, and don't move a muscle.
- Howdy, friend. How's about a little game of chance?
- Tell you what I'm gonna do. If you pick the real duck, he's yours. If you don't, he's mine. Okay?
- You can't tell the real duck from the decoy.
- Now you see him. Now you don't. Proving the hand is quicker than the eye.
- Okay, bub, round and round he goes. Where he stops, nobody knows.
- Now, which duck is for real?
- Hee hee hee! That old hound dog picked the wrong one, eh, little duck? Eh, pal?
- Good fetching, boy. Good show. A stout dog and all that.
[...]