A few weeks ago, swimmer Cameron Leslie was asked what he thought about the fact his main rival, Russian Roman Zhdanov, would not be travelling to the 2016 Rio Paralympic games.
The Russian had shown up at the World Championships in Glasgow in 2015 and beat Leslie, and broke his world record as well.
In 2012 Paralympics, Zhdanov wasn't in the pool. The only person with a Russian accent who got wet in that final was 25 seconds behind Leslie in last place.
But in three short years a world record-breaking Russian came out of nowhere and defeated Leslie. It proved to be a catalyst for Leslie, who was contemplating how he was going to structure his life - and it's a busy life - in the lead-up to Rio.
Leslie chose to focus on swimming. And on winning gold and going fast.