When this happens to you(and it will because corned beef hash *is* the meal of kings) just use a proper tin opener. In fact, use a tin opener even when it doesn't happen to you and post a twitter pic of your opened tin with key unused, captioned 'Fuck you meat-packing industry', then fax your arse to their corporate HQ.
(
RRNot is a miserable sinner,
Fri 22 Jan 2016, 7:41,
archived)