It is possible to invert your camera using a special technique known as Inverse Camera Angle.
If your running forward while getting inverted cam you have 1 less frame to release Z. Additionally, you must input down 1 frame earlier and hold it for at least 2 frames. If you release Z on the last frame possible (2nd frame after pressing Z) You can start holding down of 3rd or 4th frame
It is also possible to turn the cam in other directions by inputting something other than down
For getting inverted cam while standing still the frame data would be: (∅ = no input)
For running forward at full speed while getting inverted cam: (you can stop holding up any time after Z)
Z+∅/↑, ∅/↑, ∅/↑, ↓, ↓, Z or
Z+∅/↑, Z+∅/↑, ∅/↑, ↓, ↓, Z or
Z+∅/↑, Z+∅/↑, ↓, ↓, ↓, Z
(∅/↑ = no input or control stick up)
While it is possible to get higher consistency using pause buffering, it is almost always done unbuffered by tapping the Z button, pushing the control stick in the opposite direction and then immediately repressing Z.
Inverting your camera angle is quite helpful for situations where facing forward would obstruct your view too much. It's used 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.