How does Tom Wolfe use imagery in The Electric Kool-aid Acid Test?

Example of Imagery:

"He goes down to the water where the Pranksters all are, a little inlet, and it is dark and placid and he gets in and wades out until the water laps almost even with his mouth, which makes it very secure and warm and calm and nice and he looks at the stars and then at a bridge in the distance. All he can see of the bridge is the lights on it, swooping strands of lights, rising, rising, rising—and just then Chuck Kesey comes gliding toward him through the water, smiling, like a great friendly fish. Chuck knows and it is very nice—and the lights of the bridge keep rising, rising, until they merge with the stars, until there is a bridge leading right up into heaven."