Not all personally mine, but among the club I used to ride with..
Broken free wheel bodged with twigs and zip ties to make a fixie.. Snapped full sus frame bodged with metal tyre levers and zip ties.. to make ride-able back to car.
Slashed tyre bodged with toothpaste tube and…… zip ties..
There’s a theme developing.. (I carry a lot of zip ties!)
Lots of broken mechs removed and single speed conversions made trail-side.
Jeff