Doping

so, wait-they shoved someone elses piss up themselves, then re-pissed it?

It's a dark world we live in if so.

The thing is, you'd do that to mask the fact that you're doping right up to the competition, rather that tailing off the juice in the run-up to it. So you'll still be secreting tell-tale stuff all the time - the longer you have the fake piss inside you, the more chance you'll get caught. That means you have to get the piss into the athletes at the last available moment - probably not prior to the race because you risk leaking too much giveaway stuff into the fake wee and getting busted anyway. So most likely was that they finished the race, ran to the changing room to get "cleaned up", shot up some clean piss and ran back out to get tested and pick up their bronze medal (if I recall, that's what the team who did that had won).

Yep, it's a dark world. But some people just HAVE to win. And if you want to compete against 16yr old Chinese swimmers who pull out a FIVE SECONDS FASTER THAN YOU'VE EVER DONE BEFORE swim, then you either have to accept coming first in the un-doped swimmers class (i.e. seventh) or join the rest of them who are doing a bit of the old "Lance Armstrong".