Fire sprinkler test. You may have seen "tests" with just the sprinkler, or the sprinkler, water and a lighter, even a burning rag on a stick, but none show a close up, with a real uncontrolled fire close up, mine does.
Yes, the water flow is not as high as you would find on a commercial sprinkler system.
Before you start whinging, why don't you try to do this, its not as straightforward as it looks.
