In Master Lin's book on SFQ Level 3 he describes the "finger growing game" (his words exactly). The way I understand his writing and his teaching, is that he uses the "game" to demonstrate the importance of "concentration" and "focus" for the purpose of energy healing.
He's not trying to exaggerate his powers or be outrageous in any way, shape or form (if you've met him you would understand this) - it's but a tool for the important lesson to be learned.
