Sometimes, technology can save you from nightmarish situations. Like running out of toilet paper when you're all by yourself. 

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(the guy came in) looking quite worried in a full black suit carrying toilet roll. After the awkward exchange and smiles, I grabbed it off him and finished what I started. Afterwards I just sort of left the loo roll on the side and I presume he went in after the smell cleared and attached it properly to the dispenser!