Just for fun, what are your go-to Claude prompts that actually work, produced good, but unexpected results, or are just plain fun.

I needed a break!

I know this post is horribly redundant with many posts here, but for the sake of brevity and maybe some fun, and some unexpected ideas, here goes:

Fun:

• Give me a graded report card on my project - be nice.
• Alternatively: give me a critical review and report card on my project (maybe not so fun)

Productive:

• Add files to outputs before generating summaries/install instructions
• Fixes: provide corrected files, no summaries, unless critical (or max 5 lines explanation)
• Review prior sessions. Is there anything I can do to reduce token expenditure during sessions?

Interesting: 

• Generative a market analysis for my App
• Conduct a pricing analysis for my App in the App Store (or wherever).
• What are "memories" you would like me to follow when working with you (after listing project memories for Claude)

and so on...

In brief mode, what are your go-to prompts that are productive, fun, or have proved how smart Claude 4.5 is?