Sep 28 - Half-motorbike, half-bicycle - an Austrian inventor says his creation, the "ErockIT", is a cool electric vehicle.
"ErockIT" riders have to pedal to get the bike going, and the faster they pedal, the faster the motor goes.
The bike can reach speeds of up to 80 kilometres, or almost 50 miles, per hour and its inventor says it could revolutionise transport.
Joanna Partridge reports.
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