Wash shrimp, drain. Cook pasta according to package directions, reserve 1 cup pasta water. Melt butter in pan, add garlic. Add shrimp and fry quicky until starting to turn pink, and then add the olive oil. Sprinkle with red pepper flakes to taste. Cook shrimp about 5 minutes - until pink and curled. Add pasta to shrimp, as well as the reserved pasta water. Toss well until all blended, sprinkle with salt and pepper to taste, and serve.