Rear Inside-Leg Attack (and Takedown). Note: this is not a sweeping kick. The impact on your opponent's rear leg should be solid, causing his knee to either buckle or break.
Kick pad drills for throwing leg kicks from the ground (scorpion position). This drill helps condition your kicks and builds power because it requires using your hips to launch the kick. A 3-minute round of this working each leg is a killer workout! Try it!
Mayweather talks boxing techniques, fighting in the pocket, demonstrates some of his boxing techniques - Intriguing viewing, especially if you are a boxing fan.