You've probably all seen the MEGA FLICKS store sign...but here's a few more that I found to be quite humorous (not my site): http://www.oddee.com/item_87332.aspx Any others?
I don't know if the first one is chopped or not, but if it isn't I can't believe Walgreen's didn't see this. Hope it doesn't offend anyone.
I guess your mind isn't as twisted as everybody else's. That Nike ad with Michael Johnson is my favorite. The Yahoo ad is probably one that will take some people a while to get. Just look at the number next to it and think really hard... There was a thread here a few years ago about a grocery store that had a sale on fried chicken to celebrate MLK day...
Yahoo! is a website and 404 is an error code indicating that a site is down, not working, or unable to be found.
I would be willing to bet that 75% of this board doesn't get it either. At least not very often... *snare crash*