I remember ages ago (when I was a kid) I read Thrasher Magazine, a skateboard mag, and they had a section on cooking on the go.
I remember a particular one that involved using a car.
Get a steak, cover in mustard, then wrap in tinfoil and wrap around exhaust backbox.
Drive for 15 mins at 40mph and then turn steak, drive for another 15 mins at 40mph.
Stop car, open foil and eat.
***Disclaimer***
Anybody doing this does so on their own risk, BulletMagnet will not be held responsible for any ill effects, because every sane person knows that cooking is to be confined to the kitchen and preferrably done by sprinkles and +1's