A dog ate my trainers!

Okay, so the 21½mi run didn't go quite as planned. So which of the following best describes what happened?

(a) A dog ate my trainers;

(b) I was abducted by aliens. They were going to demand a large ransom, but I told them a few jokes and they released me immediately;

(c) I arrived at the tube station to find it was shut. When I eventually got to Hyde Park, the toilets were locked. Uncomfortably, I set off on my run and availed myself of some more accessible facilities after about 4 miles. Sadly, my tense running style over those first few miles took its toll and I ground to a halt after about 17 miles.

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