i'll thell the hole story:
So one night i was sleeping(it was around 2 am) and i am woke up by a luod knocking on the door, i look through the peep hole and it's some sort of homeless guy, he talked to me for about five minutes,then he really wanted to come in, luckily the doors in my apartment building are very resistant, he started kicking the door for about 3 minutes, then someone heard him and called the police, i still am wondering how he got in the building since we have payed fo some sort of "defense" to avoid these creeps...