I usually never put anything in all caps; but, here's the exception.
WEAR SAFETY GOGGLES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I've never had a mag spring shoot at me before, but if you end up struggling with it, it's inevitable that you MAY end up pointing the magazine at yourself, at which point (from personal experience) the spring will magically blow out of the magazine.
Fortunately, it missed my eye; but never again will I screw around with any magazine or highly loaded spring without safety goggles.