You are correct that experiencing hallucinations for the first time during adulthood is not uncommon. Hallucinations can be caused by a variety of factors, including drug use, medical conditions, and sleep deprivation, among others. In the scenario you described, it's possible that the tired truck driver could be experiencing a hallucination or some other type of sensory distortion.

However, it's also possible that the truck driver is experiencing a real, unexpected event, such as the appearance of a UFO. In such a situation, it would be important for the driver to try to remain calm and assess the situation objectively, while keeping their safety in mind. They could try to document the event or seek help from authorities if needed.

Overall, it's important to consider all possible explanations for an unexpected event and approach the situation with a level-headed, rational mindset.
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