A boy knocked a 72-year-old with a heart condition to the ground and kicked him after the man slowed his car to allow a girl to cross the road.
The man was driving along Brodrick Road, Hampden Park, at 3.15pm on November 9, when he heard a bang on his car, said police.
He told officers he stopped and got out to ask a boy nearby if he had been responsible for the noise.
The boy responded by knocking the man to the ground and then kicking him, leaving him with cuts and bruises and suffering from shock – said Eastbourne Police.
Police say the attacker was a white boy in his teens, 5’7” to 5’9” tall, of medium build and with fair hair. He was wearing a dark jacket and light grey tracksuit bottoms.
Officers are keen to speak to anyone who saw what happened or who may have other information concerning the incident.
They are asked to provide details online or call 101, quoting serial 822 of 09/11.
Alternatively they can contact Crimestoppers or phone the independent charity anonymously on 0800 555 111.