In a medium skillet, heat the olive oil over medium high heat. Toss in the garlic, and cook for 1 or 2 minutes. Add the greens, 1/4 teaspoon salt, pepper, and red pepper. Sauté for 3 minutes, moving the greens around a bit so they don't scorch. Flip the greens and continue to cook until tender. Finish with the splash of vinegar. Remove to a plate.