He boarded the train, but his clothes stayed behind.

An Arizona man was arrested after authorities said he allegedly broke into a Union Pacific locomotive and surfed atop the moving train in the nude as it traveled through northeastern Colorado, leaving stunned witnesses watching the bizarre ride before deputies took him into custody Thursday.

The Sedgwick County Sheriff’s Office identified the suspect as Daniel Ray Ballance, of Quartzsite, Arizona, and allege he broke a window to enter the locomotive before climbing onto the roof while the train was moving.

Ballance faces felony and misdemeanor charges following the incident, authorities said.

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Authorities said witnesses reported seeing Ballance riding naked atop the locomotive before deputies arrested him.

The sheriff’s office later shared his mugshot alongside a tongue-in-cheek Facebook post about the arrest.

“For those of you who had the unfortunate experience of seeing this gentleman surfing naked on top of a moving locomotive yesterday, I want you to know that he was arrested on felony and misdemeanor charges,” the sheriff’s office wrote.

According to the sheriff’s office, Ballance later told deputies he loved “vodka, beer and playing the Banjo.”

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“Daniel expressed his love of vodka, beer and playing the Banjo,” the agency joked. “Unfortunately, we had to separate him from those loves and the train ride.”

“Instead, Daniel is spending some time at an all-expenses-paid stay in jail, where he is presumed innocent until proven guilty,” the sheriff’s office added.

Ballance was booked into the Sedgwick County Jail on felony and misdemeanor charges. Court records detailing the charges were not immediately available.

KDVR reported Ballance allegedly broke a window to gain entry into the Union Pacific locomotive before climbing onto the moving train.

Authorities have not publicly disclosed what prompted the incident or whether anyone aboard the locomotive was injured.