Let the wok (or skillet) get really hot. Add sesame oil, and saute the onions, scallion whites, garlic and hot pepper flakes for about 1-2 minutes. Add shrimp and sauté until no longer translucent. Add rice and cooked eggs along with soy sauce and fish sauce, mixing well for about 2 minutes. Sprinkle scallion greens on top, and serve.