On activate - Named brick - Walls and floors - spawn explosion - mininuke - 2.000 
Ok, instead of doing that lagshat, here's a suggestion:
when a prisoner hits the button, he sets all the floors to kill, and on the bottom floor or selected floors, there will be 2X mininuke explosions.
Since, the mininuke explosion is big, we shouldn't have to worry about it lagging because we will only have to use a few to carpet the whole jail.