Hair extension test fake/real?

I had purchased some hair extensions on the internet and was wondering after reading a few posts about their authenticity.
I was suggesting to burn a strand to see if it was real or not.

Yes mine are human hair. thank goodness after spending a ton on them!!!
I also burned a synthetic hair and it smelled just like plastic.
It balled up into a hard little ball and did not budge when I felt it.
As opposed to the human hair which balled up and flaked off when I felt it. Also stunk like burnt hair.