Fist bumps are a thing with friends. We bump fists to celebrate our companionship. It's a symbol of brotherhood. But for David Rush, fist bumping is another Guinness World Record. The Idaho man already had 250 Guinness World Records, but this time, he added another feather to his World Record cap by doing the maximum number of alternating fist bumps in 30 seconds.

On January 29, Rush shared a video of himself getting into a "fistfight" with a neighbor's son. His clip soon went viral on social media, reported New York Post.

Rush said on his website: "Joey (who he worked with to set the record) and I had to punch each other thousands of times to make this happen. We bled, we sweated. We bruised." He also mentioned how he had to remove his "brass knuckles." He quipped, "We got rid of the unfair pain when Joey made me take off my brass knuckles (wedding band)."

The stunt aimed to hit most alternating fist bumps in half a minute. Rush and his partner reportedly managed 273 fists in 30 seconds. Nafees Istay Taufiq Antu and Akibur Rahman Saikat previously recorded 174 fist bumps in April 2022.

In March 2022, Rush also set up his record for the most fist bumps in a minute. He did it by fist-bumping 152 different people. Talking about the strict rules of Guinness World Records, he said: "The final result: 273 alternating fist bumps in 30 seconds, taking down the previous record of 174 by a large margin. We made contact 297 times in 30 seconds, but Guinness has stringent qualifications for what constitutes valid alternating fist bumps and 24 had to be disqualified."

Getting into the technicalities of his latest stunt, the prolific Guinness World Records holder said that this one was harder than the previous one. "The main area of technique we had to work on was Joey's drifting left arm. When moving each hand back and forth five times per second, it's easy to lose control over some aspects and have form degrade," he explained. 

Rush has set over 250 Guinness World Records—including the fastest and slowest juggler in the world, the most bowling balls juggled, and the most consecutive ax-juggling catches—reports NPR. In August 2022, this persistent record breaker set Guinness on fire by blowing up balloons with his nose and nasally inflating ten balloons in 60 seconds.

"I crossed the 200 Guinness World Records broken milestone with one of the 5 hardest for the most kiwis sliced in one minute using a samurai sword while standing on a swiss ball," he wrote. "I revisited my very first record – longest duration blindfolded juggling, this time extended the record from 22 minutes 7 seconds to 32 minutes 7 seconds." His website has more interesting information about his achievements.

Rush is right behind Ashrita Furman, who hails from Brooklyn and has over 700 records in her name since 1979. But for him, winning these titles is not a personal gain. He aims to break 20-30 Guinness records per week to promote STEM (Science, Technology, Engineering, Math) Education.

He practices in the middle of a full-time job as a Product Manager and spends time with his family. Rush said: "You make time for what is important to you."