Possible Clues:

• 'This is bad'
• Expression of apprehension
• 'That definitely isn't looking good'
• A little radioactive matter in contact with the molecular constituents of water: whoops!
• ''Holy cow!''
• 'Things aren't looking good'
• "Could be a problem"
• 'This is looking bad!'
• ''Looks like trouble''
• Worrisome remark by a surgeon