christian trousedale was seen helping elderly man home from shops .
aldi worker , 18 , held 95-year-old 's hand as he carried his shopping bag .
his act of kindness went viral and has been ` liked ' by more than 250,000 .
one customer saw trousedale at work and hugged him in the aldi store .
mr trousedale said he 's ` blown away ' by the reaction to the simple act .