Kevin Johnson on Instagram: "🔥⚡️🏆 Put an athlete on a unilateral balance hold on a spring-suspended platform and everything changes. That platform never stops moving — it forces constant core engagement, hip control, and real-time stability under chaos. 🌪️🦵🏽🔥 Then you start throwing multiple tennis balls — fast, unpredictable, and they can’t choose which hand to use. 🎾👀⚡️ No patterns. No comfort. Just pure reaction and instinct. That’s where athletes separate. And this drill hits every s