Final answer:
The provided content does not include details on how David scares Alexis at the motel, as more context is needed to accurately address this question.
Step-by-step explanation:
The content available doesn't provide a direct answer for how David scares Alexis at the motel that night. It seems the question may be referring to a specific scene from a literary work, film, or television show that isn't covered in the provided information. To accurately respond to this question, more context is needed regarding the specific source material being referenced. David and Alexis at the motel. If you could provide more context or details about the source material, such as the title of the book, movie, or TV show, I might be able to help you with your question. Alternatively, if you have more details about the specific scene or the characters involved, that would also assist in providing a more accurate response.