Very good !
Water may also be very dangerous when used to extinguish some types of fires, though only certain types of fires get this hot.
One type of fuel that can do this is magnesium. Magnesium burns at 3600 F (2000 C) and at close distance is brighter than the Sun! Since magnesium burns so very hot, it can actually split water into hydrogen and
oxygen (2 H2O --> 2 H2 + O2). Then the hydrogen and oxygen undergo combustion due to the excessive heat to form water again. It may fuel a fire or simply explode killing all firemen.
Another is called thermite, which is a combination of aluminum powder and iron oxide (rust) - this will burn just as hot as magnesium.
O.K. Your turn.
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Yes, I cheated and googled it. 
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No prob. You google, you learn. Anyway, nobody said it is forbidden.
