While web swinging with Spider-Man, press Z for the boost and hold it. When you reach the end of your swing, press C and rotate the Nunchuck to the Left or Right, while still holding Z + C. Spider-Man will start to look like he is having a spasm and will remain at the end of his swing, defying the laws of gravity. Play around with the Z + C combination to do different things, such as moving like a ceiling fan while under the monorail.