At the Cima Leon: Centcom location, a rideable soapbox derby car can be found found near one of the exits of the base. The car is extremely fragile and will explode after taking enough damage, which is odd considering it is only made of wood and has no engine. At the coordinates 'N 40 48.040 E 5 42.045', Mario Frigo can be found sitting in one of these with an empty one next to him. Getting in it will allow you to race Mario down the hill.