One time a student asked about using the raising of both hands to do fajing demo. My first reaction was why this demo?
Its not that we can’t have the occasional fun with fajing demo to entertain friends. Its that if we do too much of it we may end up believing in our invincibility.
A demo is just that a demo. To answer I said yes there are ways to do this demo. Some would demonstrate subtle skills whereas some show off functional strength.
I would prefer to focus on training a reaction that is more appropriate for use in a self defence scenario. If you do this type of demo once too often your first reaction when grabbed this way is to try to throw the person backwards. Its fine as long as its a demo.
However, when used in a self defence scenario it doesn’t do much to the attacker. He’ll just come right back and try something nastier.
So to train self defence work on combat type of reaction. To train fancy demo tricks join the circus.