christian trousedale , 18 , walked the elderly man to his front door , holding his hand as they made their way to his home in horwich , near bolton .
his act of kindness was seen by samantha-jayne brady , who stopped them to take a picture which she then posted on facebook .
picture of mr trousedale and the pensioner has been ` liked ' a quarter of a million times and shared by 70,000 people .