Yes. I was soon to discover that the only thing more dangerous than a deranged half-plant half-duck is a deranged half-plant half-duck in love.

10 seconds sound clip from Darkwing Duck - Beauty and the Beet (S1E3).

You can hear this line at 00:14:42.407 in the DVD version of the TV Series.

Quote context

[...]

- Oh, I can't believe it. She likes me. She really likes me. All these years we've worked together, I never knew.

- And so, while Bushroot turned from vengeance-crazed vegetable to passionfruit...

- I decided to exercise my world-renowned deductive abilities.

- I checked the minutest details, carefully weighed all the possibilities and painstakingly examined each clue with staggeringly scrupulous scientific scrutiny.

- But little did I realize that the Bushroot scenario was heating up.

- Yes. I was soon to discover that the only thing more dangerous than a deranged half-plant half-duck is a deranged half-plant half-duck in love.

- Ooh! Ah! Ooh! Ah! Ooh! Ah! Ooh!

- Thank you. Hmm, now I wonder if I should put on a tie or just grow my own.

- Ooh, lovely. Hmm, should I go for the rakish look? Or perhaps something more modern. Ah, there, much better.

- Oh, no, not a weed. And right before my big date with Rhoda.

[...]