Here is the "Rolled Over" Achievement.
You need a decent vehicle. Then drive to the airport located on the far right of the first island. Jump of the mini ramps until you get five consecutive rolls or flips. When I did the five rolls, it did not give me the achievement until I went off another jump. I'm not sure why.
Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.