heh! How long have you got?
I think my favourites are:-
Snapped the non-drive side crank so I pedalled the 15 miles back one one legged.
Snapped the drive side crank clean off, just scooted home, that one was about twenty miles
I’ve pushed the bike thirteen miles home after having lots and lots of punctures in both wheels, used up all my spare tubes and patches.
But I guess the best was only about 5 miles when I’d forgotten to take a pump with me, early morning ride, only a short loop so didn;t think it’d be a problem. As I’m riding along this path, a girl comes running the other way. I spend too long looking at her and ride into a tree. Punctured. I figured the push home was suitable punishment. ;.-)