Nope. That type of death is usually based on bleeding around the brain that compresses the brain down onto the brain stem. The quickest way to do that is a direct shot to the brainstorm but that is in a difficult location. Plenty of people have tried and just blown off their face or the skull. And if you successfully injure the brain, it would take awhile. You would hear moaning, gagging, gurgling. If anyone heard this, they would probably have nightmares or severe PTSD. That's some shitu wouldn't want to hear on tape. Fuck your life up forever. Let alone see it.
I would say hanging, guillotine or tying a large rock to their feet and dropping them into a Olympic size pool would be the most humane without the old drugs. Which it's too say, not humane at all.