- - mine collapse is a hazard
- - hidden difficulty dangerous to miners
- - hidden difficulty caused by subsidence in mine
- - potential hazard for miners?
- - Hidden danger that may trap miners
- - the hazard of a mine collapse
- - Hidden danger behind returning medication boxes
- - the hidden danger of mine subsidence
- - Hidden obstacle
- - Hidden danger
- - Hidden hazard
- - Hazard
- - Hidden difficulty
- - Unsuspected hazard
- - An unsuspected danger
- - Unforeseen difficulty in mine before collapse
- - Bit of fruit leading to sinful occasion's a banana skin
- - Unforeseen or unexpected difficulty
- - Tip back and tumble into trap
- - Booby trap and mine everyone gets around fine
- - Unexpected danger parking the thing before autumn
- - Unsuspected difficulty
- - Atari game with tar obstacles
- - Unforeseen difficulty
- - Trap for the unwary
- - Unforeseen difficulty of Italian female wearing shroud
- - Unforeseen problem in theatrical part before season in US
- - Unforeseen trouble
- - Unexpected problem as female piece of advice upset everyone
- - Unseen danger
- - Unexpected difficulty
- - Danger spot
- - Danger for the unwary.
- - Drawback
- - Trap
- - Snare
- - Stumbling block
- - drawback, snag
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