No worry! I get calls like that. One claimed, in a text message, that I was entitled to £5,100 as a result of my accident. What amused me was not that I had not had any accident but that someone could give an amount for the damages, down to £100, without knowing anything about my 'injuries' or loss of earnings or any other factor in a claim.
Your caller was taking a guess on limited information he had. Every now and again he'll strike lucky and find someone who has a claim, false or otherwise, to make.