"Experienced" is a poor term to use when describing nonexistence. You weren't there, there was no mind, there was no you, thusly there is no memory and even if there were, it would be of nothing.

The notion is more that because you did not exist, you had no mind, no consciousness and thusly there was simply nothing. Not you, not an experience for you to absorb.

it's a weird concept because there is no way to really describe it that relates to anything we know. We know ONLY of existing. We can't know of not existing because not existing precludes the ability to be cognizant of it.

It's one of those things you just have to accept. When we die, we simply cease to exist (unless you believe in an afterlife). The closest thing that I've experienced to being aware of non-existence is being put under general anthesia. You are lying there with doctors and nurses peering down at you over their masks, wearing their funny little hats, they tell you to count backward, by the time you get to two and a half, you're gone. When you do eventually come back around, you just have a big empty spot that you time traveled through. No dreams, no thoughts, no awareness, just nothing.

The only difference with death is the whole not coming back around bit. Of course, since you will not exist, you will not be concerned with that part because you will not be.

Imagine if you got kicked in the nuts and then you stopped existing. You don't exist, so it can't hurt and you can't worry about it what with your non-exisistent mind to not think about it.

Also, you don't get a choice. You can worry about the sun setting, but that doesn't stop it. Just try to enjoy the sunshine while you can and learn to be ok with the fact that night will eventually come.