Charger + shopping cart + temper = cops

It's VERY easy. Buy an inexpensive spring loaded push button switch and wire it in parallel to the brake pedal switch.
The brake light will function normally and will function when you press the button.

P.S. You come up with a lot of this kinda stuff when you're young and full of energy. While you're at it, mount another switch on the dash and an aftermarket windshield squirter tank and pump in the trunk and plum a line so that the nozzle sticks up and aft slightly from under the rear bumper or the lisence plate. Fill the tank with water and what ever food coloring you choose...now that's some funny stuff right there!!!