Having a heart for God can look crazy
Think about it. David danced wildly for the Lord in broad daylight, in public. He was crazy about God. His devotion for God was off the charts. We know this not just through His glorious, raw, real, and even vindictive Psalms, but because God Himself tells us so. David was a man after God's own heart. David wanted God. Another example of David's antics - he actually pretended to be insane! "'So he [David] pretended to be insane in their presence; and while he was in their hands he acted like a madman, making marks on the doors of the gate and letting saliva run down his beard. Achish said to his servants, “Look at the man! He is insane!'" I Samuel 21:13-14 David was afraid for his life because King Achish was out to get him. People do crazy things when they think their life is at stake. Some of David's Psalms are a bit mad, too. Boy, did he want his enemies pulverized! And he minced no words in letting God know how he felt and how he wanted God