First of all, I'd like to distinguish between what is called a religious experience and what might be called a spiritual experience. Lets not flame this please. Many years ago, I went to a meditation camp let by Pir Vilyat Khan, the sufi leader in the US. This was held in an open air tent with a couple of hundred people. At one time, we chanted the Zhikr. The actual transation of the words were unimportant (I don't speak arabic), but the sounds resonate. I found myself having an experience as somekind of self observer--kind of looking down on myself from outside, watching my thoughts but not being connected to any of them. Kind of like a description of the Buddhist observer description. At one point however, a thought came up, "who is watching the watcher". This caused be to experience being back in my body. I had a similar experience doing a chant from the Kabbalah and is similar to the descriptions in "The Cloud of Unknowing" by a christian monk.
When my son was 10 years old, his mother had him on ADD drugs. When he came to visit me, I had him do a short meditation. He told me that it felt similar to taking the medication (which he was not doing when he visited me).