Just when you think you have seen it all, a guy goes and allegedly tries to fornicate with a red van.

On Tuesday evening, cops in Dayton, Ohio received a 911 call about a man "pulling his pants down and swinging on stop sign," according to a Dayton Police Department report.

In a second 911 call, the witness told police that the suspect was attempting to have sex with the front grill of a parked vehicle.

The 911 caller reported that during the autoerotic encounter the suspect was seen "sticking his genitals in the grill of a red van at this intersection." The man subsequently "laid down and possibly passed out" before rising to begin walking in circles "like he is on some type of drug."

The victim was parked at the time, cops say.

Responding officers came upon Michael Henson, 35, who "appeared under the influence of some type of narcotic" and was only wearing gym shorts and shoes. He was then arrested for public indecency and booked into the Montgomery County jail, where he is being held in lieu of $2500 bond.

In a sidewalk interview, the woman who called 911 told police that she saw Henson pull down his shorts and expose his penis, which he then “placed...in the front grill of the van and began humping it as if he was having sex with the van.” Henson did this “for a while” before passing out in a neighboring yard, she added.

Cops tracked down the owner of the "violated" van, but he told them he had not witnessed what investigators termed “the sex act.”