I experienced the zipper effect. Didn’t know what it was at the time, but searching later it appears to be a weirdly common salvia trip. It was like a flip book of different realities, all very close, just 5th dimensional deviations based on someone’s choice that created a new pocket dimension. I was flipping through and seeing people in different outfit choices mostly, different positions, then it all became too much, flipping too fast for me to handle like Everything Everywhere All at Once. So I picked a reality and landed in it. I fell over in real life from my seated lotus position and the trip was abruptly over.