Pulling a prank can be fun, but from the looks of this one, it can also be expensive and time consuming. A prankster struck the London subway system and placed a large number of fake signs throughout it. Take a look at some of these fun signs and see if they wouldn't draw a laugh from you.
Conan O'Brien announced his first week of guests for his upcoming TBS late-night talk show.
The premiere night of Conan will feature Seth Rogen and a musical performance from Jack White.
The rest of Conan's premiere week:
• Monday, Nov...