The mirror and whistle were developed for and tested extensively by Doug Ritter for the AMK PSP, see http://www.equipped.org/psp/amk_psp_faq.htm I'm not sure if the mini version of the Rescue Flash™ Signal Mirror has received the same level of testing.
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To the last, I grapple with thee; From Hell's heart, I stab at thee; For hate's sake, I spit my last breath at thee.