For those that cant be bothered opening past topics, "Stand mast on ground, grab mast below join, begin shaking mast as fast as you can, will vibrate itself loose".
OK i've separated a number of masts now and this never fails.
Get a good size rubber mallet Place your foot on the bottom part on the mast to hold it to the ground Then swing that mallet. Be sure to give it a good few love taps. The top half will bounce off.
Might take about 4-6 swings.
Happy days. Next time tape that join. I don't but i don't rig up in sand, but i do keep a rubber mallet in my car. Ya never know...right!!!