Can't say if these guys had the Holy Spirit or not, but up in the Appalachian mountains there are snake handling preachers who believe even if they are bit while handling a snake during services, the spirit will protect them.
I have seen them, too! Bizarre. I do not believe in the Holy Spirt, so when I see phenomena like that I consider scientific explanations. Instead of using those experiences to build faith in God, I wish people would use those experiences to build faith in themselves. The human body (especially the brain/mind) is capable of amazing things.