I remember Gyani Maskeen Singh ji has said in a few of his kathas how some people when they're doing simran and go really deep in it with all the dhyaan sometimes feel as if they're going to die . He said it feels VERY SCARY, so scary that some people literally scream themselves out of their simran , but its a golden opportunity to kill your "mann" and I remember him saying that its actually death of your mann thats happening that moment but some people get freaked out and lose this opportunity. Can someone tell me what is this ? because it makes me nervous to do simran lest I go really deep and attentive . Also has anyone experience something like this .