Not normal from my experience. Breathing is very essential in the experience. You can transmute the pain by singing high pitch noises and Icaros from your essence of eternity. But I would only guess it is not to your advantage to breathe so intensely. The breathe is severley tested with Kambo and even an experienced meditator might find they can't keep track.
I find solace through song, and honestly that is the only way I make it through sometimes. Kambo loves singing, it is the epicenter of the musical harem in the perils of heaven this frog keeps the peace between heaven and hell.
