Zhang Yali, 49, tests a giant bicycle designed and made by him and his friends. The 3.2-metre-high and 5.5-metre-long three-seated giant bicycle, weighing over one tonne, cost Zhang more over 20,000 yuan (3,156 USD). Zhang spent two months making this bike as a gift for his son, a 25-year-old part-time cartoonist.
as for the vehicles... i guess if you have no family, no loved ones, and don't care whether you get crippled or drown or whatever, then these are great ideas.
@Norm101 ...or a weird quad;)