Swimming coach's wild reaction to Olympic win is an instant-classic meme

20-year-old Australian swimmer Ariarne Titmus is making her mark at her first ever Olympics on Monday, beating out American champ Katie Ledecky to take gold in the women's 400 metre freestyle final.

Titmus, whose nickname is "Arnie", smashed her personal best time in the race, at 3:56.69, ahead of Ledecky's 3:57.36. Ledecky...