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Following the announcement of Prince Harry and Meghan Markle's engagement last week, we thought we'd remind you of some of the extraordinary proposals we've heard about on Outlook over the years. Take Nik Wallenda for example. He's the high wire walker who became the first person in history to walk a tightrope over Niagara Falls. His wife Erendira is no slouch either...she once performed a stunt where she hung by her teeth from a helicopter over Niagara Falls. So, as Nik told Matthew Bannister, his proposal to Erendira was never going to be your average one…

(Photo: A man holding a wedding ring behind his back. Credit: Getty Images)