A character hitches a ride by clinging to the underside of a vehicle. This can be done as a means of tailing someone who has their own vehicle when you do not and you cannot risk losing them, or as a means of infiltrating (or exfiltrating) an enemy compound, dropping off the vehicle once you are through the gates. Do Not Try This At Home. There are a lot of moving parts underneath a vehicle that can chew up a human body real good. And if you fall off - and you will - not only will you hit the road at high speed, you stand a good chance of being run over by the very vehicle you were riding on.