hereThe boy's mother, who wishes to remain anonymous, said the family have been left traumatised since the incident and said her son has been struggling with nightmares.She said a neighbour alerted her to the incident on Saturday night and she raced around the corner to find her son lying on towels, covered in blood, after being slashed.The 40-year-old, from Droylsden, told the M.E.N: "He was with his five friends hanging out, walking in the area."They heard footsteps and cars screeching.