The Zipper Slide

I scrambled up the wooden slats beside the doorway to reach a heavy dark jacket hanging low! Right along the front seam ran a long track of shiny silver metal teeth. Naturally, I couldn't resist a good test. I grabbed the sturdy metal zipper pull with both gloved hands, planted my boots against the thick fabric, and heaved downward with all my might! Zzzzip! The slider buzzed like a runaway gear, zipping down three inches and parting the stiff collar wide open! Wahoo! A heavy-duty mechanical gate unlocked in a flash!