or one way of doing it anyway...
load up your cymbal sample as normal, and put some moderate compression on.
Then, create a really low sample (around 20Hz) with a quick decay (longer decay = longer effect, play with it) and Normalise it to 0db. Then! layer this low sample with your original cymbal...... now the compressor should kick in big style! After the compressor, put in a notch filter (or low cut) to get rid of your 20Hz sample, and voila..... exploding cymbals without the need for a side-chain. You can get some really cool results with this method, especially if the rest of your percussion is going through the same compressor