There was a hard knock at this woman front door, not a regular knock but almost barging but then she didn’t feel right and did not answer the door as she was all alone. After several such knocks, they finally left. She glanced through the glass of the door and there was a man. After about half-an-hour, she walked outside to look for what it was and found something really strange at her door. There was a rubber band around the knob of the door to hold the door open.
Professional thieves use this technique in order to ensure they unhinge and get inside once you unlock the door. When the door is open, the thief will burst in and attack you.
Source:healthyandnaturalhouse.com