That's just not true. Microwaves do not cook "from the inside out." That's almost literally an old wives tale. At 2GHz, almost all radiation would be absorbed in the outer layer of skin and re-radiated as heat. Even for EM that can better penetrate solid/fleshy objects, the energy that penetrates will be attenuated because some portion will be absorbed at the exterior, and if the energy at the surface wasn't enough to trigger a pain response, then you probably (definitely) have nothing to worry about.
That said, there are two items of note: 1) EM may travel better along bones as they may be less dense (in birds, for example) or natural conductors (nerves), but fortunately nerves are the things we *want* to be stimulated, and unless you have a bone sticking out, the radiation must still pass through the skin, which has nerve endings. 2) Exposure to an extremely high EM energy source might be enough to cause thermal damage before you can react, but that's not a risk that's unique to electromagnetic radiation -- any energy in quantity can kill you.