Live on a large London estate (think used to be all council, now a mix of owners, renters, social etc - makes no difference just giving an idea of size/layout of estate). Work up to hear shouting/banging on door, someone saying 'let me fucking in' etc. Absolutely terrified, sounded like the front door to my block so crept down and saw no one there. Stuck head outside and saw a bloke hammering door of block opposite, getting increasing violent/upset. I called the police - they came, were v nice but he wasn't there anymore. Asked them to knock on door/check on block generally but think they thought I was overreacting. Was I stupid? I was just scared for someone inside there...