Nick Stahl: Arrested for "Lewd Act" in Adult Video Store

Earlier this year, Nick Stahl went missing.

Last night, meanwhile, the actor was found… touching himself inside an adult video store.

Authorities tell TMZ that undercover LAPD officers were conducting a basic check of an establishment in Hollywood when they stumbled upon Stahl in a private booth, committing a "lewd act," according to the official report.

Pee Wee Herman and Fred Willard can explain to you what that means.

The Terminator 3 was "touching himself" and booked on the misdemeanor charge of lewd conduct; he was released after a few hours at the police station and told a TMZ cameraman that the situation was just a "misunderstanding."

Stahl freaked his wife out in May of this year when he disappeared, only to later resurface and enter rehab.