How to use emergency braek to stop

I usually only use the emergency brake on my 2000 Camry CE when
parking on a hill slope.  I've never thought of and never tried to use
it in an emergency to stop the car.

So in case I do get into an situation where the usual front and rear
brakes fail, I want to know how the emergency brake functions.  Here
is what I plan to do.  I'll drive my car at a speed of around 40 to 50
mph on an empty space, then I'll use ONLY the emergency brake to stop
the car.  I want to feel how it works so I can be ready in a real
emergency.

Since I never tried this before, I want to check with experts here.
The manual doesn't say to try something like this.  So I wonder if I
can actually try this.  Will it hurt my car?  Thanks.