First, what do you mean by overdose? Do you mean a fatal overdose?
If you mean a fatal overdose, then the truth is that it is very very hard to fatally overdose on benzos UNLESS YOU MIX IT WITH OTHER DRUGS OR ALCOHOL.
So, if you are taking the clonazepam on its own, it is extremely unlikely that you would have a fatal overdose (though you can put yourself in danger by the stupid things you might do while under the influence).
However, if you are mixing it with alcohol or other drugs, a fatal overdose is quite possible. So...what is your exact situation?-DG