Rob is making a leaf out of a solid piece of metal.
You can see that the leaf is attached to the square shaped pole.
Rob is heating up the metal! When it is red, it is not at the hottest
it could be!
He gets it to be red so that he can hammer it into shape. If it
gets too hot (starts getting yellow or even white) he has to cool it
in the tub of water. When the metal is really hot it becomes brittle
and can break.
