ISIS claimed responsibility for a truck attack in the Spanish city yesterday, which killed at least 13 and injured 100 more.
The atrocity – and a second attempted attack in the nearby town of Cambrils overnight – have appalled people all over the world.
But rather than cower in terror, one absolute legend hit back in the only way available to him.
“Less candles and more balls”
As a Spanish new correspondent reported on the slaughter, the bloke walked into shot wearing a T-shirt with the slogan “FCK ISIS”.
In case anyone was unsure if he knew what he was doing, the chap pointed to the message and smiled.
Eagle-eyed viewers spotted the cheeky stunt and shared it on social media.
Micah Elwood posted a clip of the incident on Twitter with the caption: “What a hero the guy who walks past is.”
His tweet has been retweet more than 3,000 times and liked more than 4,000 times.
People leave a cordoned off area after a van ploughed into the crowd
Since then, the hashtag #FCKISIS has been being used on Twitter – particularly by Spaniards trying to come to terms with the attack.
One Twitter user, @elenitaC16, called for fewer vigils and more action.
Writing in Spanish, she said: “Less candles and more balls. #FCKISIS”
Cholo Simeone tweeted: “Because Twitter can be wonderful and #FCKISIS”