I took a buddy up for his first flight a few years back. Flight went sweet. When we got down I asked him if he enjoyed it. He responded: " The flight was great - but look at my arm!!"
He had unzipped in a rush, catching his skin. Then, rather than taking the zip back down to release the skin - decided to do the band-aid all in one removal technique It was not pretty, he drew blood!
I find pulling the zip away from my arm slightly as I unzip helps avoid this problem.
Long pain free flights,
J