A great tool to incorporate in your BOSU-ball workout is the power knee. So the way you can start with that is by putting one leg, one foot in the middle of the BOSU-ball. You lift your knee up and back down, and then to actually make it powerful, you're going to speed it up. So you're going to just lift and lower as fast as you can, and maybe you do this for time. So you see how many you can get in 30 seconds or 60 seconds, and then to make it even more powerful, you can add a jump. So you bring your knee in and you jump up. This one would be more about strength than about speed necessarily, and that's how you do the power knee. Again, it's a great tool to incorporate in your BOSU-ball exercises.