A singer I know was on stage actually singing when his own mobile (which he had on his belt) went off he stopped singing and answered thus :- Oh yes Chris I'll talk to Bill, it's the £250,000 question !! . Hi Bill right a/ Tony Blair b/ Iain Duncan Smith c/ Bill Clinton d/ Osmana Bin Ladin. Yeah the answers a/ Tony Blair. Then he put his phone back in his belt.The person who phoned was most bemused but the audience had a good laugh.