There are some videos buried in the X archives of idiots eating this stuff. I thought they were
going to die.
I don't know about Prowlee's Nagas but as for Dave's, to paint you a pic of how hot it is:
I can almost literally drink Texas Pete and Tabasco. And they are both generally considered pretty warm.
I bought a bottle of Dave's and had to throw it out before I used it all because it sat in my fridge for that long. It was so hot that you could really only use very small amounts at a time. It will go bad before you use it all.