Evidently this act is intended to stand in sharp contrast with Hamlet's sparing of his enemy. The King would have been just as defenceless behind the arras as he had been on his knees; but here Hamlet is already excited and in action, and the chance comes to him so suddenly that he has no time to 'scan' it. It is a minor consideration, but still for the dramatist not unimportant, that the audience would wholly sympathise with Hamlet's attempt here, as directed against an enemy who is lurking to entrap him, instead of being engaged in a business which perhaps to the bulk of the audience then, as now, seemed to have a 'relish of salvation in't.'