There's also this Segway incident, though he was a company executive and not an "inventor" http://www.nbcnews.com/id/39377851/ns/world_news-europe/t/segway-com

There's also this Segway incident, though he was a company executive and not an "inventor" http://www.nbcnews.com/id/39377851/ns/world_news-europe/t/segway-company-owner-rides-scooter-cliff-dies/ http://www.nbcnews.com/id/39377851/ns/world_news-europe/t/se...