What does molly feel like normally and when you almost die of it

I am sorry that this post might be controversial, but I am writing in case it can provide me with some answers, some understanding in my time of grief.

My partner just died of an overdose of molly (he'd taken Vyvanse too, and we're not yet sure if that factored in).

He was sweating, stumbling, eyes fluttering, apologising and saying it was too much, and then he collapsed on the sidewalk and began convulsing.

I don't know if he ever regained consciousness but I did read that usually there is no pain during seizures.

I know everyone is different and that we will never know the true answer in this case, but my two questions are:

1) What does it feel like to be on molly?

2) has anyone here ever done molly to that degree and come back from it, and what was it like? Does your life flash before your eyes? What do you remember about what you could see, or hear, or feel?