Not quite that I have staff for this sort of thing, but in dire circumstances I've been know to try a four-hander, i.e. one person each for jar and lid, so the lid-holder can use two hands to maximise grip. Works best with the jar sat on a worktop, though, or it just leads to a sort of fruitless aerial wrestling.
(I'd be much more nervous of the knife/jar combo since I heard about sabrage.)
no subject
Date: 2014-11-24 12:11 pm (UTC)(I'd be much more nervous of the knife/jar combo since I heard about sabrage.)