You focused the repulsor energy through ionized plasma channels. It's effective. Not very efficient. But it's a passable knock-off.
8 seconds sound clip from the Iron Man 2 movie soundboard.
You can hear this line at 00:38:23.378 in the Blu-ray version of the movie.
Quote context
[...]
- Monsieur Stark, on a vérifié ses empreintes et on n'a rien trouvé. Même pas son nom.
- Par là.
- Pretty decent tech. Cycles per second were a little low. You could have doubled up your rotations.
- You look like you got friends in low places.
- And you forget all the lives the Stark family has destroyed.
[...]