Watch the moment a daredevil great-grandad became the oldest person to take on the fastest zip line in the WORLD - aged 94.<br /><br />Great-grandfather-of-four David Aris lost his beloved wife, June, to cancer five years ago.<br /><br />For the last few months of her life she had been cared for by St John's Hospice in Lancaster.<br /><br />Brave David took on Velocity, reaching speeds of 100mph, at Zip World, Penrhyn Quarry, North Wales, to raise money for the hospice, on July 29.
