After Lee and Allerton split up, we see Lee back in Mexico City, in a dream or hallucination in which he walks into a room and sees a snake on the floor, eating its own tail and crying a large tear.

The second snake is also CGI. It's made to look like a San Francisco Gartersnake, which is found on the San Francisco peninsula. Why? San Francisco has a long connection to drug and gay cultures, but almost no viewers would know that, so they probably just like the way it looked. It has been called one of the most beautiful snakes. In the real world, snakes don't cry tears, but it's completely allowed when we're seeing a character's hallucinogenic inner reality, as we are here.

A snake eating its own tail is an ancient symbol that is known as the Ouroboros, which is said to represent infinity and the eternal cycle of life, death, and rebirth. It symbolizes the unity of opposites and the idea that creation and destruction are the same continuous process.