Related Clues:

• Hit bottom
• Stumbled
• Descended
• Lost one's footing
• Lost value
• Plunged
• Took a tumble
• Keeled over
• Took a spill
• Activated, as an alarm
• At one __ swoop
• Went from bull to bear, e.g.
• Threw, as a switch
• What Jack and Jill did
• Activated, in a way