Why Did the Fingerprint Kit Get Such Glowing Reviews From the Whole Lab?
A glowing lab review turns out to be explained by the most basic thing its subject has ever done.
The Joke
Why did the fingerprint kit get such glowing reviews from absolutely everyone in the lab?
Colleagues said it always knew exactly how to leave its mark, no matter the case.
Witty's Word
A heartfelt testimonial so perfectly suited to its subject that the praise practically pressed itself into the page.
Explain the Joke
'Leaving your mark' is a common phrase for making a lasting, memorable impact in your field. A fingerprint kit's entire purpose is, quite literally, to capture and preserve physical marks left behind at a scene. The punchline lets the professional compliment and the object's basic function merge into a single, perfectly imprinted phrase.
Why People Love This Joke
The joke's neatness comes from how perfectly the compliment fits the object — of all the tools in the lab, the fingerprint kit is the one for whom 'leaving its mark' could never possibly be just a figure of speech.
Joke Breakdown
The setup poses a question about an unusually well-reviewed piece of equipment. The punchline 'knew exactly how to leave its mark' resolves it by reusing a phrase for making a lasting impact that also happens to describe — completely literally — the one thing the object has always been built to capture.
When to Use This Joke
Perfect for police-themed humour, double-meaning lessons, kids' joke books, and any moment a professional compliment doubles unexpectedly as a literal description of an object's job.