Jarsquatter, also known as 1 Guy 1 Jar or 1 Man 1 Jar, is a shock video made by a Russian man named Alexey Tatarov. The video was posted onto eFukt on December 4, 2008. The video is so jarring that it had received millions of views on video-sharing sites. The video also appears on the 18th level on Runthegauntlet.org. It showed a naked man standing over a jar than squatting on it. The jar begins to be inserted up his rectum, Once it is fully submerged, the jar breaks and his bottom is bleeding all because of the sharts of glass. This video started to become popular and people did challenges where they would react to the video. The day after the video was posted on eFukt, the Golf MKV Forums member danger dan posted a link to the video, describing it as the “most disgusting thing” on the internet. On December 22, a reaction video was uploaded by YouTuber mdrproductionz, which accumulated upwards of 135,000 views and 1,100 comments in the following five years. On August 20, 2009, a 1Man1Jar site was launched with an auto-playing embed of the original video. On October 8, 2012, Redditor gravity submitted a post to the /r/vertical subreddit, featuring a vertical four-pane comic using screen captures from the show Lost with captions describing the Jarsquatter video in horror, which received over 600 upvotes.

On February 23, 2013, Redditor suthrnpride44 submitted a post to the /r/FiftyFifty subreddit, with its title claiming to be either a screen capture of the Jarsquatter aftermath or a photograph of a duckling. The post, which linked to an image of a swimming duck, gained more than 460 upvotes and 10 comments in the next month.

There were new trends and versions of 1 Man 1 Jar. Each version was different and had almost a similar name. Here's a list of each shocksite name for the trend videos

2 Girls 1 cup
1 Man 1 Screwdriver (Which is the same dude who made 1 Man 1 Jar)
3 Men 1 Hammer
2 Men 1 Horse/Mr. Hands
4 Girls and fingers (Same people who made 2 girls 1 cup)
Cake Farts (Different name)
2 kids 1 sandbox

These trends later died down in the future. But that never stopped streamers to react to these videos! God save anybodies souls if they see the uncensored versions of these videos! (NOT FEATURING LINKS)