Stuck Primers

[mrmiskin]

Was reloading some 3006 but I guess this would apply to any cartridge. Cleaned all the case pockets and had 4 cases from a different batch of brass. 2 of the cases primed with no problem and 2 got the primer hung up. One curled the brass on the case and the other curled the primer. Question is what is the safest way to get the case out of the shellholder once this happens?? Thanks.