When trying to wild I always get to the stage where its hard to breate, my whole body feels really numb and I "get the sensation of the black that I see from my closed eyes sort of washing over me, as if it is extending beyond my normal view" (had to copy this because I couldnt really describe it). After a few minutes my breating goes back to normal and the numb feeling around my body goes away. Any Idea what the problem is? Thanks in advance.