folks, please don't do this
#TrainTwitterpic.twitter.com/MB6th1PGmK
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
I was shocked when I saw this couple years ago. There are more clips like this. 
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.