It is possible to invert your camera by holding Z for 9 frames, letting go, and immediately holding direction for 6 frames, and hold Z again. However, as it is quite difficult to measure out these frame counts properly unless doing a TAS, pressing Z, pushing the control stick in the opposite direction and then immediately repressing Z is the preferred method. Inverting your camera angle is quite helpful in a number of tricks including Tektite Hover to the fishing pond, and Tektite Hover to the Boss Door in the Water Temple as a child, as well as numerous other tricks where timing is crucial. The below video illustrates multiple camera angles that may be useful in a variety of situations.
