Clark Gable III -- Arrested For Lasering LAPD Helicopter

Clark Gable III is in custody right now ... after being arrested last night for allegedly pointing a laser at an LAPD helicopter ... TMZ has learned.

We're told Gable -- an aspiring actor -- was driving around in Hollywood with friends last night, driving in the direction of the Hollywood sign. Gable's family tells TMZ ... he was trying to point the laser at the famous sign, but apparently his aim ain't so good.

A short time later, cops swarmed and accused Gable of pointing the device at the chopper -- a huge no-no.

Gable has had his share of problems. In 2009, he was stabbed in the rib cage by a fellow party-goer.