He's practically breathing fire by the end of the song.

In a testament to human perseverance and the dominance of mind over matter, a video uploaded to YouTube on Sunday has been generating viral buzz because, in large part, of the sheer novelty of what it shows: two guys downing ghost chillies and then playing the heck out of a Frank Sinatra song.

Image via YouTube

In the video, Danish chili enthusiast Chili Klaus, on the right, and singer Michael Caroe, left, each pop one of the world's hottest chili peppers in their mouths.

Then they get to work on "My Way."

Image via YouTube

Caroe barely makes it through the song, hiccuping uncontrollably near the end, but watch as he toughs it out below:

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