Julia Popova Gruesome ... Julia didn't notice blade in her back   THIS mugging victim had a six inch knife plunged deep into her back — and she didn't even feel it.   The shocking picture shows the blade sticking out just above Julia Popova's shoulders and blood pouring from the wound.   Incredibly the 22-year-old, who was knifed by a mugger on her way home from work, failed to notice the appalling injury and managed to calmly stroll to safety.   The office worker had grappled with her attacker when he snatched her handbag as she walked to her