Lest there be any delusions that troubled former child star Lindsay Lohan was back on the straight and narrow, it looks like the tempestuous actress is back up to her old tricks. A week after she totaled her Porsche, ABC news is reporting that producers of the Elizabeth Taylor biopic she’s filming frantically called 911 when repeated attempts to get her to answer the door of her penthouse apartment went unanswered.

The L.A. County Fire Department was dispatched, broke into the place and found Lohan — described as an “unconscious person” in the apartment.

Lohan’s rep, Steve Honig — who, by the way, has the toughest job in Hollywood second only to Charlie Sheen’s rep — offers up this totally plausible and not-ridiculous-at-all explanation: “She was on set last night at 7 p.m. and worked through the night until 8 a.m. this morning. She took a nap before shooting her final scene. Producers were concerned when she did not come out of her room and called paramedics as a precaution. Lindsay was examined and is fine, but did suffer some exhaustion and dehydration.”

Honig capped off this whopper by noting that “Lindsay was never taken to a hospital; reports to the contrary are false. She is resting now and is hoping to be back on set later this afternoon.”

The L.A. County Sherriff’s office desscribed Lohan’s condition as “groggy” but OK.

Hey, sounds perfectly normal to me. Who hasn’t taken a nap only to be woken up by an axe smashing through your front door?