Anything below 1k......MAXIMUM FABRIC ABOVE MY HEAD...HOWEVER if i am in a downplane scenario below 1k MAY GOD HAVE MERCY ON MY SOUL I THINK HE IS READY FOR ME I dont think I could react in time......like you said no solid answer but the chance of impending doom decreases somewhat with more fabric ..SCARY ASS S!@# HOPE I AM NEVER IN THIS POSITION😬😬😬😬