"RAINBOW!" Twilight hollered at Rainbow as pegasus crashed through yet another window.

"Huh?" Rainbow replied, brushing herself off. "By the way, Twi, I don't think that putting a force field around a hole in the wall would do anything good for you."

Twilight raised a brow. "Don't you mean glass?" she began, trudging away for a broom.

"Glass?" Rainbow asked in return, "What's that?"

Twilight frowned and pointed to a nearby glass vase.

"Cool!" Rainbow exclaimed, rushing towards the vase in question, "You made these flowers float by themselves?"

Twilight gave up on trying that day.

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