Psychedelics are some of the most personal substances to exist. Your experience, while completely valid, is not everyone's experience. For me, while I haven't gone as deep as some with mushrooms, I find that I remember quite a bit about my mushroom experiences. The only time I've ever had such a "time hole" was when a broken finger was operated on and I was placed under anesthesia.

It may be a "drug induced state", but the power of that state can be amazing.