The Olympic women's synchronized 10m diving final is currently on, but no one is really watching the divers - they're all wondering why the pool is so green.
Just 24 hours earlier, British divers Tom Daley and Daniel Goodfellow secured a bronze in the men's final in a clear blue pool.
But Tonia Couch and Lois Toulson found the same pool to have been an unappealing emerald colour.
-- David Common (@davidcommon) August 9, 2016
-- Andrew Cropper (@andrew_cropper) August 9, 2016
Seriously - look how blue the pool was Monday for the men's final.
And compare that to Tuesday...
Even Tom got in on the act.
What would happen to you if you dived into the green pool? Nobody knew.
Bit surprised people are diving in that green pool and still coming out with a full head of hair and haven't grown a third eye #Rio2016
-- Ben Wills (@_BenWills) August 9, 2016
They were worried about the water quality in #Rio2016 - but not in the diving pool! That green colour looks dangerous
The BBC commentators were so confused by the pool's colour that they asked an official what was going on, but they said they didn't know.
Literally this guy commenting on the diving on @BBCSport is cracking me up
Like everyone else we are trying to solve the green water mystery at the Olympic diving venue.
-- David Amber (@DavidAmber) August 9, 2016
"The diving pool has turned green and no one knows why." Good #Rio2016 quote at the media center.
-- Andrew Sharp (@andrewsharp) August 9, 2016
It did add a certain something to events.
-- Rod Francis (@InRodWeTrustMTL) August 9, 2016
There are rumours of an official statement being made, so hopefully the mystery will be solved soon...