What happens next?

How to get burn marks out of carpet
Loosen up the fibers with a pair of tweezers.
You want the carpet fibers to stand up as straight as possible, which will make it easier to target the burnt pieces. Use the tweezers to brush the fibers back against the grain, plucking at them a bit to loosen them up.
Snip off the burnt top layer with a pair of scissors. Try to only cut the black or brown burnt part, not the lower, unaffected layer.