According to Dr Michael Mosley just asking a person to give up their seat works half the time!
http://www.bbc.co.uk/iplayer/episode/b00xhgkd/The_Brain_A_Secret_History_Mind_Control/#recommendSource=tv_episode_page
http://www.bbc.co.uk/iplayer/episode/b00xhgkd/The_Brain_A_Secret_History_Mind_Control/#recommendSource=tv_episode_page
