Who would have thought that the strangest thing about Charlie Sheen's life would NOT involve drugs or prostitution... but car theft?!?

For the second time in four months, the actor has had his car stolen and driven off a cliff.

In February, authorities found Sheen's SUV off Mulholland Drive. He later admitted that he left the keys in the ignition and no suspects were ever apprehended for the crime.

Now, THE SAME THING HAS SOMEHOW HAPPENED AGAIN. According to a spokesperson for the Los Angeles Police Department, Sheen once again left his keys inside his Mercedes, which was parked in his driveway... which is located inside a gated community.

Charlie Sheen: A moron, a scheming individual or both?

Police alerted the actor to the car's disappearance around 3 a.m. this morning. They then located it on the side of the road in Beverly Hills, less than a mile from where the original incident took place.

Sources say the cops are referring to this situation as "suspicious," while one officer told Us Weekly:

"The investigation is ongoing. It's impounded for [finger] printing."