As if Elon Musk’s week couldn’t be more eventful, the Tesla (TSLA) CEO gave the automotive world more news to chew on.

In a tweet last night, Musk said Tesla has begun production of its long-awaited electric Tesla Semi truck, and that deliveries to Pepsi (PEP) would begin on December 1st. In a follow-up tweet, Musk said the semi would have 500 miles of range and would be “super fun to drive.”