[header] How to repair a snag in berber carpet [title] Look closely at the pulled loop of carpet. [step] Identify where the yarn is woven into the backing material and where it comes out to form the next loop. You may need to pull on the snagged loop to identify where the yarn goes next. 
[title] Place one knitting needle, screwdriver, or other long, thin tool through the snagged loop of carpet. [step] This will prevent you from pulling the loop all the way through the backing.