An International Olympics Committee spokesperson blamed spectators using Twitter at the London Olympics for a network overload that prevented GPS data from cyclists from reaching commentators, Reuters reports. The GPS transmitters on the bikes in the competition record location data and send it over data networks like O2, but due to the network issue, television commentators had to resort to their own timings. As Reuters reports, the IOC spokesperson said it would "certainly never prevent people" from tweeting, but "if it's not an urgent, urgent one, please kind of take it easy." The spokesperson says "it's a network issue, and it is that which we are working on."