Not since my last Grateful Dead concert. Nothing like it. The gas sounds like a whole bunch of bees on each side of your head, and then you either pass out if you're not careful, one guy died at the last GD concert from a balloon!
Nde is totally different, some people are in white lights (earlier in this tread I mentioned *light as a solid), everything's more acute, more colorful more everything; often there are beings there we may or may not know, some people describe what we commonly call angels, or messengers. But that's if you get the good ride, I suppose, I know people who didn't, they've described a completely different journey and it wasn't pleasant
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