Yes, that's what I found so fascinating about combining drugs. Nitrous oxide and opiates for example (caution: nitrous is a fire accelerant and what killed Tony Hsieh [1]). I was able to achieve a state similar to hypnagogia [2]. My only point in commenting is that anesthesia is not like being dead, as far as I know - nobody knows what being dead is like. I'm old so my time is approaching. I look at it like my last big trip. Who knows what will happen!
You hope you go under fully.