This 82-Year-Old Retired Aerospace Engineer Completely Rocked Simon Cowell’s World On ‘America's Got Talent’

"Nothin' wrong with me!"

Last night on "America's Got Talent," we were treated to a few special acts.

We were introduced for the first time to the "next Taylor Swift," Grace VanderWaal. She performed an original song called "I Don't Know My Name," and wowed the crowd and judges. 

After the first note, everyone knew how special this singer was. The song was so good that Howie Mandel even put her through to the next round of live shows with the Golden Buzzer.

On the opposite side of the age spectrum, we met 82-year-old, retired aerospace engineer John Hetlinger.

The friendly retiree from Broomfield, Colo., who loves his karaoke, explained that appearing on AGT is the "high point in my life and many careers."

Due to his calm demeanor, the crowd and judges alike expected some smooth rendition of a Frank Sinatra song.

However, this former Navy pilot still likes his adrenaline rushes and instead lashed out into a killer version of Drowning Pool's classic, "Let the Bodies Hit the Floor."

No one could quite believe what they were hearing, but after a few seconds, everyone got into it.

Drowning Pool saw Hetlinger's performance and even tweeted out that he was welcome to join them at their next show and beyond.

Well, looks like it's about that time to come out of retirement for a new career in heavy metal. Watch his audition below: