Forgive me, but I believe your boast sounds vaguely familiar.
7 seconds sound clip from The Transformers (1984) - Heavy Metal War TV Series.
You can hear this line at 00:03:41 in the DVD version of the movie.
Quote context
[...]
- Unload and attach them to your new invention at once.
- I am honored to serve, Megatron.
- Scrapper's invention will give me the power to defeat the Autobots, once and for all.
- Forgive me, but I believe your boast sounds vaguely familiar.
- We failed before through no fault of mine, but this time I shal not be denied.
- Huh? Those signals spell trouble and I'm talking Decepticons.
[...]