Just... one... last... blast!
7 seconds sound clip from The Transformers (1984) - Fire in the Sky TV Series.
You can hear this line at 00:20:49 in the DVD version of the movie.
Quote context
[...]
- Where are you, traitor? Show yourself!
- You shall pay for your treachery!
- Just... one... last... blast!
- He risked everything to save us and the Earth.
- The energy drain has been stopped.
- And the Decepticons are defeated.
[...]