During the filming of "Borat", the FBI started a file on Sacha Baron Cohen after receiving numerous complaints about a strange man traveling around the country in an ice cream truck

“[The FBI] got so many complaints there was a terrorist traveling in an ice cream van,” the actor said. “So the FBI got so many complaints that they started compiling a little file on us and eventually they came to visit us at the hotel. I obviously went missing when I heard because [the film crew] were like, ‘FBI’s downstairs. Sacha, disappear.’”

[US Magazine]