I was flying on QF from Singapore to Frankfurt as SLF. One of the passengers had gotten into his duty free booze, and was abusive to anyone and everyone. When the cabin crew confiscated his grog, things got even worse, until the CC produced zip-cuffs, handcuffed the guy, and took him away (I assume to a crew seat). I'm sure there would have been a welcoming party of BGS for him in Frankfurt too
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Well done to the CC involved.