Confused about a Donald Duck cartoon

[Wussycat]

A few days ago, I was watching a Donald Duck cartoon in which Daisy is a big nag, and Donald found this polite and charming guy who looks exactly like him.

Donald pays his doppleganger to charm Daisy and make him look good, but then the doppleganger doublecrosses him and takes Daisy for himself.

At the end, they're all in the tunnel of love; Daisy and the doppleganger in one boat, and Donald in another.

I looked away from the TV for one second and, suddenly, they came out of the tunnel of love and Daisy and Donald were in the same boat and she was nagging at him.

What did I miss?

[TnAdct1]

A few days ago, I was watching a Donald Duck cartoon in which Daisy is a big nag, and Donald found this polite and charming guy who looks exactly like him.

Donald pays his doppleganger to charm Daisy and make him look good, but then the doppleganger doublecrosses him and takes Daisy for himself.

At the end, they're all in the tunnel of love; Daisy and the doppleganger in one boat, and Donald in another.

I looked away from the TV for one second and, suddenly, they came out of the tunnel of love and Daisy and Donald were in the same boat and she was nagging at him.

What did I miss? The end joke for the cartoon.

While inside the Tunnel of Love, Donald, who chased his doopleganger and Daisy inside without a boat, gets into a fight with his clone over Daisy. When the smoke clears, it's revealed that both Donalds have accidentally mistaken Daisy for the other Donald and threw her overboard. However, they don't notice it until they exit the tunnel, which results in a hillarious shot of the two Donalds holding each other's hands. When the two Donalds discover that they've been holding hands and realized what they done to Daisy, they turn around to find her, who is all wet after being thrown out of the boat, storming out of the tunnel and returning to the nagging mode that she was in at the beginning, which results in the two Donalds running for their dear lives.

[Zam]

Dude, the old Donald duck shorts were the best!

Some of his violent antics could be sensored by today's standars.

[Donald Duck 12]

Haven't seen this one in a while! A classic!