Cutting roof sheet with wire - GIF

[odd one]

I've used circular saws with the blade on backwards. Does a great job but even military noise canceling ear muffs can't reduce than noise to a comfort level for me.

Your not joking about that noise. I do not think I have ever created a louder racket than that, not to mention the shrapnel that it would throw even with an enclosed metal saw. I ended up buying a guillotine type sheer with the dies/blades of the profile of metal that I used....but that had its own issues.