iron sand boat throw

She could not move her arms because they were being held down. The coin holder she
needed for her Railgun was lying a bit away. It seemed like Mikoto could do nothing
about the self-destruct device about to detonate, but that did not enter into her own
thoughts. One should not underestimate the Ace of Tokiwadai Middle School, a
prestigious school in Academy City. She was not the type to be defeated just because one
or two of her trump cards were sealed off.
A great noise burst out.
It was the sound of a large amount of iron sand moving up from the white beach around
her.
The mass of black powder spread out around the flying fish with a radius of five meters.
It was both a barricade to keep the tourists from getting close and her final key to
turning the situation around. According to Mikoto’s will, the great amount of iron sand
attacked the flying fish from all sides and coated it 360 degrees around without leaving a
single gap.
(If I don’t have a coin for my Railgun...)
Mikoto smiled.
Bluish-white sparks flew from her bangs indicating the presence of a high voltage
electrical current.
(...then I’ll use you as my ammunition!!)
A tremendous roar rang out.
The giant flying fish that had been covering Mikoto was fired up into the sky.
The flying fish and the iron sand coating it was blown away. Of course, it was not a coin,
so it did not reach three times the speed of sound, but that did not particularly matter.
The giant flying fish flew away diagonally and was caught by gravity at an altitude of
about two hundred meters. It arced like a long throw in baseball, passed beyond the
tourist area, and disappeared beyond the horizon.

- Toaru Kagaku no Railgun SS1, Chapter 1