melted coin

Mikoto gritted her teeth, moved her thumb, and fired the Railgun. As the coin flew
through the air at three times the speed of sound, friction caused it to glow orange
making an orange line through the air.
With a slight delay, a great noise exploded out.
Because she had fired at an angle rather than from directly below, the coin melted and
disappeared just before it struck the Xiuhcoatl ship. Even so, the melted remains just
barely reached it. One of the wings made of cloth and obsidian on the side was forcibly
torn off.

- Toaru Kagaku no Railgun SS1, Chapter 7