Gus, I guess you are saying that the blood vessel rupture happened outside of the ear canal? Folding down the auricle is interesting. What you are apparently doing is trapping air inside of the external ear canal instead of the whole outer ear. The low pressure from reverse squeeze should still happen, but not on the outside of the external ear canal. So I guess the real question here is the external ear canal less subjectible to blood vessel rupture?
Here is an image that might help us view what we are talking about, if it turns out well enough.
Don
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