
Safety Not Guaranteed
Published March 24, 2026
Also known as: SNG · The Time Travel Ad
"Safety Not Guaranteed" is an internet meme based on a joke classified ad seeking a time-travel companion, originally published as filler in the September/October 1997 issue of *Backwoods Home Magazine*1. The ad exploded online in late 2005 when it became one of YTMND's biggest fads, paired with a photo of a stern-looking man with a mullet and the *Scarface* track "Push It To The Limit"6. It later inspired a critically acclaimed 2012 indie film starring Aubrey Plaza and Mark Duplass2.
Overview
The meme centers on a brief classified ad with an absurdly deadpan tone:
> *WANTED: Somebody to go back in time with me. This is not a joke. P.O. Box 322, Oakview, CA 93022. You'll get paid after we get back. Must bring your own weapons. Safety not guaranteed. I have only done this once before.*
What makes the ad so funny is the collision of mundane classified-ad formatting with a completely insane premise. The writer treats time travel like a freelance gig, complete with payment terms and a liability disclaimer. The line "I have only done this once before" implies both that time travel is real and that it went badly enough to warrant a warning1.
On YTMND, the ad is typically displayed alongside a photograph of a stone-faced young man sporting a mullet, though this image was not part of the original print ad6. The combination of the man's dead-serious expression and the ad's matter-of-fact tone about time travel created an irresistible comedic package. Paul Engemann's "Push It To The Limit" from *Scarface* plays in the background on most versions, cranking the absurdity up further4.
Gallery
Origin & Background
How It Spread
How to Use This Meme
The original meme format is simple: pair the classified ad text (or a portion of it) with the mullet man photo. On YTMND, this was typically set to "Push It To The Limit." Common variations include:
Historical placement: Photoshop the mullet man's face into photos from different time periods (the Civil War, ancient Rome, the moon landing) to suggest he actually did travel through time6.
Mashups: Combine the Safety Not Guaranteed format with other memes or pop culture properties. The ad text or the mullet man's face gets dropped into other templates4.
Quote the ad: Use the ad text (especially "Safety not guaranteed" or "I have only done this once before") as a punchline or caption in unrelated contexts.
Cultural Impact
Full History
Fun Facts
Silveira wrote both the time travel ad and a personal ad seeking a girlfriend using the same P.O. box. The personal ad got five responses total. The time travel ad got thousands1.
Responses came from every U.S. state and every continent, including Antarctica1.
The *Jerry Springer Show* invited Silveira to appear. He declined, saying he wasn't a good enough actor to pull it off1.
The film was shot on a $750,000 budget and grossed $4 million domestically5.
Director Colin Trevorrow's next film after this small indie was *Jurassic World*, which grossed over $1.6 billion worldwide5.
Derivatives & Variations
PTKFGS crossover:
"Safety Not Guaranteed Changes Internet History" (March 8, 2006) depicted the time traveler replacing YTMND with PTKFGS, spawning its own counter-version called "Security Not Ensured"[4].
Don LaFontaine voiceover:
A YTMND featuring the famous movie trailer voice reading the ad, created October 31, 2007[4].
Civil War photo:
A supposedly antique photograph "found in an attic" appearing to show the mullet man during the Civil War era[6].
Wikipedia vandalism wave:
Starting February 2006, YTMND users repeatedly edited Wikipedia's "Safety" article to include the ad text, forcing page protection[12].
Film adaptation:
*Safety Not Guaranteed* (2012), a full feature film starring Aubrey Plaza and Mark Duplass[5].
Musical adaptation:
A stage musical premiered at the Brooklyn Academy of Music in fall 2024[5].
Frequently Asked Questions
References (18)
- 1YTMND Soundtrack - YTMNDarticle
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- 4Safety Not Guaranteed - Know Your Memeencyclopedia
- 5Safety Not Guaranteedencyclopedia
- 6Talk:Safety - Wikipediaencyclopedia
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