Related Clues:

• Sloping trough
• It breaks a fall from the sky
• Ladder counterpart
• It opens during the fall
• Way down for mail or laundry
• Certain jumper's need
• Laundry duct
• Base jumper's need
• Slide film for audience
• Way down South, author's lost it after chapter's written
• Call "Fire!" — have this on before you jump?
• Fall slower (when para drops)
• Sloping channel
• Laundry channel
• It provides for slow descent - or rapid