Had a ball with a red one. It lasted 2 weeks. I jumped it and did all the stuff on advertizing commercials. Fun but it bent the fenders, broke off the exhaust and broke the brake lines ;-)
Of the jets in production that promise to take military fighters deep into the 21st century and beyond, the U.S. F-35, the Chinese J-20, and the Russian Sukhoi T-50 PAK FA are at the top of the heap.