In a bowl, whisk together the lime juice, olive oil, garlic, chili powder, cumin, paprika, salt, pepper, and red pepper flakes. Then pour it into a resealable bag, add the shrimp, toss the coat, let it marinate for 30 minutes. Start your Grill on 'smoke' with the lid open until a fire is established in the burn pot (3-7 minutes). Preheat to 400F. Next place the shrimp on skewers, place on the grill, and grill each side for about two minutes until it’s done. One finished, remove the shrimp from the grill and enjoy!