Katie Ledecky is at her best in swimming's most gruelling races, but she has never come closer to throwing up than after her win in the 200 metre freestyle at the Rio Olympics.
The American was really feeling the pain after her shortest individual event and second gold of the 2016 Games.
"That hurt pretty badly," Ledecky said.
"It's the closest I've come to throwing up at the end of a race. I was just glad to get my hand on the wall first. It was a stressful race and I feel good now that it's over."
Ledecky edged rival Sarah Sjostrom of Sweden at the wall for a winning time of one minute and 53.73 seconds.
It was not another world record for the American, just a reminder of how versatile and dominant she has become since her breakthrough 800m gold in London as a 15-year-old.
It has reached a point that everyone else in the pool truly is racing for second place - and they are happy to admit it.
"It feels like gold that I'm after her," Sjostrom said. "I couldn't have gone any faster, it's impossible."
The Swede had Ledecky in her sights throughout the final 50 metres but simply could not do anything about it.
"I took it pretty fast and forced everyone," Ledecky said. "Once I was ahead I was not going to let it out of my hands."
The result was Ledecky's second gold medal of the Rio Games, along with silver from the 4x100m freestyle relay.
She has two events still to come and the teen was asked after Tuesday's race if she was the future of American swimming.
"I'm kind of the present, too," Ledecky said.