Tesla Motors (NASDAQ:TSLA) has had a great couple of days. The Silicon Valley electric car maker posted a first quarter profit, the first in the company’s history. Additionally, it beat its own guidance of 4,500 vehicles, and delivered 4,750 of its Model S sedans. Tesla shares fired up and surged 16 percent on Monday. The company’s estimates and purchase orders were raised for the next quarter as a result. Investors are also anticipating another big announcement on Tuesday, from a mysterious tweet from founder and CEO Elon Musk who promised that this announcement would be bigger than the quarterly results. Additionally, the company dropped its cheapest car option, with a 40 kWh battery pack, which only 4 percent of buyers opted for.