Should one hyperventilate before jumping to increase chance of fast unconsciousness?

[ChronicPainExistent]

Since hyperventilation is associated with fainting.

 

[Linda]

I don't think it will make any real difference. Hyperventilation doesn't affect you instantly. If you jump from 100 feet you will hit the ground in about 3 seconds, and if you land on a hard surface, such as concrete, death will be almost instantaneous.