Blood for the Baron!

Flynt and Vicky, Stark Enterprises' computer whizzes, go to work when...
Vicky: Look at this, Flynt! I found an abandoned boombox!

Flynt: And I found two MP3 players. What a lucky day!
Vicky: It won't be such if we are late.
Flynt: Let's take them to work. I don't think Mr Stark cares if we do.

In Stark Enterprises facilities...
Tony Stark: Doctor Octavius, what are those strange tentacles for?
Octavius: I use them to take hazardous material.

While Otto Octavius bores Tony Stark by talking about his tentacles' technical specifications, the boombox and both MP3 players brought by the workers assume their true forms...

...as the Decepticons Frenzy, Buzzsaw and Laserbeak!

Buzzsaw manages a precise shot to Tony Stark's heart, while Laserbeak shoots the catwalk where Octavius was standing.
Tony: Doctor Octavius...! Argh!

Frenzy and Buzzsaw corner the workers, while Laserbeak welcomes two tanks.
Laserbeak: Welcome, Big Brother. The place is already ours.

Soundwave: Aclaration, unnecessary. The result was inminent.

Soundwave: This facility and everybody inside it now belong to the Decepticons.

Great dio! Best one so far!