Stuck driveshaft u joint.

Im trying to remove the slip yoke from the durango drive shaft im using for my challenger and im having some issues. I broke a c clamp and in the process bruised my hand pretty badly. Luckily i had a face mask on because my friend was using an angle grinder nearby but i did not expect my clamp to just break and throw the other half across the garage. Any ideas on how to break the u joint free without a hydraulic press?
Author: bullet18