Austin Powers pun
Sometimes news puns are accompanied by an image of Austin Powers. The first Austin Powers pun was made on July 23, 2009 by DoctorBerry in a thread about a drunk man who stuck two hammers up his ass. DoctorBerry observed that he must have been "hammered," and posted the image. The next four pages of the thread were made up entirely of Austin Powers puns, before ventilated arrived and threatened to permaban further punsters for meme shit.
Michael Jackson/Moonwalk pun
The OP linked to an article by the Huffington Post about a man who was forced to Moonwalk at gunpoint.
Shortly after, user Dippeggs posted: "That felon should really look at the man in the mirror." Which got him banned by Dav0r for 3 days, which was extended to 7 days shortly after for "Being an idiot." after posting: "I like a good thriller." in response to Rents's comment about how if you're going to stick a gun in someone's face it might as well be funny.
After 4 full pages of non-stop puns and comments about the bans, the Moderators decided to re-add the "No puns" rule, until they became "legal" again.
This thread is also notable for being nominated for Thread of the Year 2012.