It is possible that it is a mousetrap scene, because in MacLiammoir's production the role (Player Queen) is played by a male. Wasn't it usual in those times (when the story of Hamlet takes palce) to have men play female roles? Perhaps that's why MacLiammoir took a male actor instead of female, because it's not Gerthrude(?if I recall correctly), but a queen in the mousetrap.