How do I make all of the mesh explode at once?

Support Particles and Physics Simulations
1

I have everything working, I just need to find out how to get more of it to explode at once.

2

Here is the tutorial I am actually working on right now, so funny you should ask! http://www.blenderguru.com/create-a-shattered-glass-title-animation/ He goes over it in the first ten minutes, and its pretty cool.