The next time you think about eating a ghost pepper, stop and consider this.

下一次你想要尝尝魔鬼辣椒酱的时候，停下来想想这个吧。 。

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For the projection aspect, a San Diego company called AV Concepts used a variation of a visual effect that was discovered in the 19th century, known as Pepper's Ghost.

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Then Mr. Bosland was told of the Bhut Jolokia, or ghost pepper, a variety grown in remote Assam, India, that was being studied by the Indian army for use in grenades.

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"Pepper's ghost" isn't the sort of phrase you hear very often at a show like SXSW. In amongst all the latest generation technology, there aren't too many folks discussing hundreds years old optical concepts.

ENGADGET