Re: Stem got stuck
have you maintained your rig by oil/ lubing it up? If it's metal on metal it can seize. If it's metal on glass, it should also help. I sure hope nobody is using their feet to hold the glass base in place, the act could break it and cut your feet up!
GLaDOS: "You euthanised your faithful companion cube more quickly than any test subject on record. Congratulations!"