Bizarre things happen in airports all the time, but it's not every day that a dude attempts to board an aircraft butt naked for, well, no apparent reason.

The male passenger was spotted by another traveller walking across the Chicago O'Hare International Airport tarmac, allegedly attempting to board a flight.

The male passenger was spotted at Chicago O'Hare International Airport. (Twitter/@ORDInsider)

"Earlier today, a naked male passenger was detained at Gate C10 at Chicago O'Hare's Terminal 1 walking around on the ramp," ORD Airport Insider Tweeted on Wednesday.

The original poster claims witnesses saw the man walk off a Delta flight before he was quickly detained by airport security.

While the reasoning behind the man getting his kit off is still unclear, social media users were quick to make light of the situation.

"It's not even shorts weather," Twitter user Holliloki joked.

"If this is the new TSA PreCheck, count me out," wrote Don Ralis.

Gary Garretson said what we're all thinking: "At least he has a decent body."

Next time you're considering getting your gear of for a super comfortable flight, fight the urge. You'll more than likely be arrested.