Giampiero Testoni straddles the sleek Energica Ego motorcycle, hits a few buttons and nothing happens. Dead silence. "Impressive, no?" he says with a smile.

Before getting an answer he's suddenly off, rocketing down curvy Skyline Boulevard with a reporter clinging tenuously to his midriff. Instead of a snarling exhaust, there's only the sound of a faint metallic whine and the rush of the wind. Impressive, yes.

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Source: http://www.ksdk.com