This is the shocking moment a Good Samaritan was stabbed by a thug in front of his young daughter following a 'ridiculous argument' over silly string. Marlon Nelson, 40, launched the vicious attack armed with a blade after his children had been told off by another father for spraying an ATM with silly string. A court heard the victim aged in his 30s had walked to his local Post Office in Hyson Green, Nottingham, with his ten-year-old daughter on August 24 at 3pm. But when he went to use the cash machine, he noticed children had sprayed silly string all over it - so he asked them to clean up the mess.