Is Elon Musk off His Rocker?

At the annual Tesla shareholder meeting, CEO Elon Musk made a super insane remark and stated that Tesla is designing submarines for personal use. Hear me out, the dude is a total genius and probably the most noticeable technological guru around, but really man.... a submarine? "Let me just hop in my submarine and go to Target", No. At some point Elon just has to realize not all of your ideas are a great one. For example, Leonardo Da Vinci had plenty of great ideas but some were so outlandish and crazy.

We like what you're doing Elon, we really do. But put you're crazy away for a little bit and focus on renewable energy, cars and getting us to Mars