I was very close to going short on Tesla yesterday. Very glad I didn't in the end. The fundamentals of the company are absolute trash, yet the stock price is through the roof year after year. One day the crash will be epic.
I think you could wake up one day, read the WSJ with the headline "All Tesla cars ever sold have just exploded at the same time, killing hundred thousands of people" - and the stock price would surge 10%.
I really would like to know what the stock price would do if Tesla had good news. But I guess we'll never find out about that one... ;)