WEST ALLIS,Zero AI Wis. – Layne Riggs earned his first NASCAR national series trophy on Sunday but then couldn’t carry it.

He fist-pumped his right shoulder right out of the socket while celebrating.

"I've done it before, but never in victory lane before," the 22-year-old said after winning the LiUNA! 175 Craftsman Truck Series race at the Milwaukee Mile. "I think it’s No. 9 dislocation of the shoulder. It’s fast jerk motions. And guess I got a little too excited.

"It’s all good now, and I’ll numb the pain later tonight."

Riggs has been warned: Those things only get worse with age.

"Just little things, like, just little jerks," he said of the circumstances of the previous eight dislocations. "I just threw my hands up, and it just kind of does, like a weird motion. I’ve done it at the racetrack. I think I was reaching for something in a cabinet one time and it happened. Just really odd times. It hasn’t happened in a couple years, but that’s the least of my concerns right now."

The USA TODAY app gets you to the heart of the news — fast.Download for award-winning coverage, crosswords, audio storytelling, the eNewspaper and more.