Tell him that (UK) 60% of all head injuries involve alcohol in the bloodstream. Ask him if he is going to wear a safety helmet, next time he goes to a bar.

More people die of head injuries from falling down stairs than from cycling accidents. Ask him if he is going to wear a safety helmet, next time he goes to bed. Or, better still, only sleep downstairs, on a futon, since people get injured falling out of bed.

In the UK in 06, half a million people received medical treatment for injuries caused by walking into street furniture while using a mobile (cellphone). Ask him if he's going to wear a safety helmet and body armour before making a cellphone call.

British Medical Association research showed that cycling 4 miles a day reduced your chances of having a heart attack by 50% and that daily cycling was twenty times more likely to extend your life because of greater health and fitness than it was likely to result in a fatal collision. Tell him you'll visit him in the cardiology department of your local hospital.

Alternatively, he is a plonker and ignoramus and should be ignored. Until you visit him in the cardiology department of your local hospital.