Elon Musk happily smoked marijuana while recording a live podcast streamed on YouTube .
The 47-year-old Tesla CEO was speaking about his electric car company on the Joe Rogan Experience when the host Joe Rogan, offered him a joint to smoke .
Musk puffed away on the marijuana-filled cigar after he confessed that running Tesla keeps him up at night. He said: "It's very difficult to keep a car company alive," and admitted to relying on sleeping-drug Ambien.
Stock prices at Tesla are plunging and Musk is expected to face a lawsuit after falsely announcing he was taking the company private and accusing a British hero diver of being a paedophile.