If a rattlesnake sees you, it's important to stay calm and slowly back away while keeping an eye on the snake. Do not make any sudden movements or loud noises that could startle the snake. Give the snake plenty of space to move away on its own, and do not attempt to approach or handle it. If you are in an area with a high likelihood of encountering rattlesnakes, it's a good idea to wear sturdy shoes and be aware of your surroundings to avoid accidentally stumbling upon a snake. If you are bitten by a rattlesnake, seek medical attention immediately.