Clean the mushrooms with a damp towel. Over medium heat, melt the butter in a large skillet. Add the mushrooms, toss to coat. Introduce the garlic, allowing to cook 1 minute prior to incorporating the remaining ingredients. Increase the heat to medium high, continually stirring for 2 minutes. Cover and heat (stirring frequently) until the mushrooms are coated with a heavy caramel and the butter separates from the Worcestershire sauce. Remove the coated mushrooms with a slotted spoon, discard any residual sauce. Makes for a great appetizer or side dish.