Steve Caplin delves into the world of tech. Tesla's Robotaxi disappointed investors. Standing desks turn out to be no better than being seated. A robotic finger can now be used for digital examinations. The Dresden Sinfoniker has a robot conductor – with three arms – to perform complex music. There's an electric version of the old BMW bubble car. You can buy Vespa scooters with 75mm anti-armour cannons attached. A bell has been designed for runners – at a price. And firemen at the Stadtallendorf fire station may be regretting not installing a fire alarm.

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