Has anyone utilized this technique to induce OBEs or AP?

Interesting. I never heard of this method. Hope that someone chimes in and answers the question properly.

Accelerated breathing pattern however with a sudden stop (holding one's breath) gave me a total sudden obe (I passed out and left the body). After this attempt and a remarkable result I started researching on the phenomenon. Still learning.

I was just taught a technique such as this today by my teacher. I used a series of short breaths, long breaths, and held my breath at certain intervals. This induced the most intense astral travel session I've ever had. I could feel my body still rooted to the floor, but also found myself in two other places at once. I was simultaneously in a forest with a thick canopy and in a wide, open space that was neither dark nor light. I've never really practiced any sort of breath control; however, during this first session, I was able to hold my breath for 2 minutes and not feel like I needed to take a breath. I could have gone longer, but he told me to take a breath during my meditation.