An Alabama school resource officer is going viral for his hilarious back-to-school photo.

The Shelby County Sheriff's Office on Wednesday shared a photo on Facebook of Sgt. Nathan Kendrick standing in front of his home with a reluctant look on his face holding a Spider-Man lunch box and a sign that reads: "2018 1st Day of School."

The post has been shared thousands of times and even launched the #SROchallenge, with school resource officers across the country sharing their first day of school pics.

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On "Fox & Friends," Kendrick explained that he has had friends and colleagues take similar pre-work photos, so he decided to give it a try.

"We know that [for] the parents and the kids, the first day of school can be stressful, and we wanted to do something lighthearted and positive and maybe try to alleviate some of that stress for them," Kendrick said.

As for the Spider-Man lunchbox? He said it belongs to his son, Gray, and he borrowed it for the day.

Kendrick, who joined the SRO unit three years ago, described the job as "the best-kept secret in law enforcement."

"Law enforcement is a tough job. You see a lot of bad things, you're dealing with sometimes the worst side of humanity," Kendrick said. "Well, when you go into an elementary school wearing a police officer or deputy's uniform and you're walking by knuckle-bumping kindergartners and hanging out with them, you can't be sad when you leave that day."

Watch more from "Fox & Friends" above.

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