that was another one of the tanks , and the air resistance in front of him seemed to disappear and a large warm hand pushed him firmly from behind , a hand that fitted every contour of his body from heels to head ; it shoved him forward with his toes barely touching the road , and now his face bore the terrified , pants-wetting grin of someone who has been attached to the world 's biggest kite in a high cap of wind and let loose to fly , fly , baby , up into the sky until the wind goes somewhere else , leaving him to scream all the way down in a helpless power-dive .