I once went on a cycling weekend to the area around Loch Tay with some friends from the Edinburgh RC. Early drive up Saturday morning for two long day rides with a night in the youth hostel. As we unpacked the car and got ready to roll on Saturday morning, I changed into my cycling shoes - first generation Sidi Genius, probably the first to have the ratchet fastening that all shoes have these days. The ratchet broke as I tightened them up - disaster! I couldn't do two days of cycling with my foot pulling out of the shoe on every little climb (the first Sidi Genius had a ratchet and only one small velcro strap at the toe)!
Somebody gave me an old leather toestrap from the pack under his saddle to wrap round my loose shoe... ok, better than nothing. Then I unscrewed the ratchet base from the side of the shoe to reveal a groove in a nylon moulding exactly the right width for a toestrap to settle into. I spent the next two days marvelling at how secure my broken shoe felt in comparison to the other.